Population Geography of Assam: Growth, Density, Distribution, Literacy, Sex Ratio & Urbanisation
Population geography of Assam examines how people are distributed across the state, how the population has grown over time, where population density is highest and lowest, and how demographic characteristics such as literacy, sex ratio, rural population and urbanisation vary geographically.
Assam's population pattern is closely connected with its physical environment. The fertile alluvial plains of the Brahmaputra and Barak valleys support dense rural settlement, agriculture, towns and transport networks, while the more rugged hill districts generally have lower population densities. Guwahati and other urban centres form important concentrations of population because of administration, industry, trade, education, transport and services.
According to Census 2011, Assam had a total population of 31,205,576. The state recorded a population density of 398 persons per sq km, a sex ratio of 958 females per 1,000 males and an overall literacy rate of 72.19%. Approximately 85.90% of the population lived in rural areas, while 14.10% lived in urban areas.
Population estimates after 2011 must be interpreted carefully. The Statistical Handbook, Assam 2025 gives a projected population of approximately 36.717 million for 1 March 2026. This is a demographic projection and not a new census count.
This detailed article examines the population growth, density, spatial distribution, rural and urban population, literacy, sex ratio, urbanisation, settlement pattern and demographic change of Assam, making it useful for geographical study as well as APSC, ADRE and other competitive examinations.
Table of Contents
- Population of Assam at a Glance
- Current Population Projection of Assam
- Population Growth in Assam
- Historical Population Growth: 1901–2011
- Factors Influencing Population Growth
- Population Distribution in Assam
- Factors Controlling Population Distribution
- Population of the Brahmaputra Valley
- Population of the Barak Valley
- Population of the Hill Regions
- Population Density of Assam
- District-wise Population Pattern
- Rural Population of Assam
- Urban Population of Assam
- Urbanisation in Assam
- Major Urban Centres of Assam
- Literacy Rate of Assam
- Male-Female Literacy Gap
- Rural-Urban Literacy Difference
- Sex Ratio of Assam
- Child Population and Child Sex Ratio
- Changing Age Structure
- Population and Agriculture
- Population and Industries
- Population and Environment
- Major Population Challenges
- Changing Demographic Trends
- Important Facts for APSC & ADRE
- Frequently Asked Questions
- Conclusion
- References
Population of Assam at a Glance
| Population Indicator | Assam | Reference |
|---|---|---|
| Total Population | 31,205,576 | Census 2011 |
| Male Population | 15,939,443 | Census 2011 |
| Female Population | 15,266,133 | Census 2011 |
| Decadal Growth, 2001–2011 | 17.07% | Census 2011 |
| Population Density | 398 persons per sq km | Census 2011 |
| Sex Ratio | 958 females per 1,000 males | Census 2011 |
| Literacy Rate | 72.19% | Census 2011 |
| Male Literacy | 77.85% | Census 2011 |
| Female Literacy | 66.27% | Census 2011 |
| Rural Population | 26,807,034 or 85.90% | Census 2011 |
| Urban Population | 4,398,542 or 14.10% | Census 2011 |
| Child Population, 0–6 Years | 4,638,130 | Census 2011 |
| Child Sex Ratio | 962 girls per 1,000 boys | Census 2011 |
| Projected Population | About 36.717 million | 1 March 2026 projection |
Current Population Projection of Assam
Because the next population census results are not yet available, current population analysis must distinguish between census counts and population projections.
The official year-wise population projection published in the Statistical Handbook, Assam 2025 gives Assam a projected population of approximately 36.717 million on 1 March 2026.
| Projected Population Indicator | 2026 |
|---|---|
| Total Population | 36.717 million |
| Male Population | 18.661 million |
| Female Population | 18.056 million |
| Rural Population | 30.869 million |
| Urban Population | 5.848 million |
These projections imply that Assam remains a predominantly rural state, although its urban population is gradually increasing.
Based on the projected figures, the urban share in 2026 is approximately 15.9%, compared with 14.10% in Census 2011.
The projected male and female totals are equivalent to roughly 968 females per 1,000 males. This calculated ratio is useful for understanding the direction of demographic change, but it should not be confused with a new census sex ratio.
Population Growth in Assam
Assam experienced substantial population growth during the twentieth century.
The state's population increased from approximately 3.29 million in 1901 to more than 31.20 million in 2011.
Population growth was especially rapid during the middle decades of the twentieth century.
However, the rate of growth has gradually slowed in recent decades.
The decadal population growth rate was:
- 34.95% during 1961–1971;
- 18.92% during 1991–2001; and
- 17.07% during 2001–2011.
The decline in the growth rate between 2001 and 2011 is an important indicator of Assam's gradual demographic transition.
Historical Population Growth of Assam: 1901–2011
| Census Year | Population | Decadal Growth | Density per sq km |
|---|---|---|---|
| 1901 | 3,289,680 | — | 42 |
| 1911 | 3,848,617 | 16.99% | 49 |
| 1921 | 4,636,980 | 20.48% | 59 |
| 1931 | 5,560,371 | 19.91% | 71 |
| 1941 | 6,694,790 | 20.40% | 85 |
| 1951 | 8,028,856 | 19.93% | 102 |
| 1961 | 10,837,329 | 34.98% | 138 |
| 1971 | 14,625,152 | 34.95% | 186 |
| 1991 | 22,414,322 | 53.26%* | 286 |
| 2001 | 26,655,528 | 18.92% | 340 |
| 2011 | 31,205,576 | 17.07% | 398 |
*The 1981 Census could not be conducted in Assam. Therefore, the 1991 change shown in the historical series covers the longer interval following 1971 and should not be interpreted as a normal ten-year comparison.
Long-Term Growth Pattern
Several broad stages can be identified:
- 1901–1951: steady but significant population expansion;
- 1951–1971: exceptionally rapid growth;
- 1971–2001: continued expansion with gradually changing growth dynamics; and
- 2001–2011: growth continued but at a slower rate of 17.07%.
Factors Influencing Population Growth in Assam
Population change results from the combined effects of fertility, mortality and migration.
Natural Increase
For much of the twentieth century, declining mortality combined with relatively high fertility contributed to rapid population increase.
Improved medical care, vaccination, public health, sanitation and food availability gradually reduced mortality.
Declining Fertility
More recent demographic indicators show declining fertility, which is gradually slowing population growth.
This is associated with:
- increased education;
- urbanisation;
- changing family preferences;
- greater access to health services;
- later marriage in many sections of the population; and
- changing economic conditions.
Migration
Migration has also influenced the geographical distribution of Assam's population at different historical periods.
Population movements may occur because of:
- employment;
- agriculture;
- education;
- trade;
- industrial development;
- marriage;
- urbanisation; and
- movement between rural and urban settlements.
Population geography should therefore distinguish carefully between natural population increase and migration-driven redistribution.
Population Distribution in Assam
The population of Assam is unevenly distributed.
The broad alluvial valleys contain most of the state's population, while the more rugged hill districts have considerably lower settlement densities.
This pattern closely reflects the major physiographic divisions of Assam.
The main population concentrations occur in:
- the Brahmaputra Valley;
- the Barak Valley;
- major towns and cities;
- transport corridors;
- agriculturally productive plains;
- tea-producing regions; and
- industrial and administrative centres.
Lower population densities occur mainly in:
- rugged hills;
- extensively forested areas;
- steep slopes;
- remote uplands;
- some flood-prone riverine areas; and
- areas with weaker transport accessibility.
Factors Controlling Population Distribution in Assam
Relief
Flat plains support denser settlement than steep hill slopes.
The Brahmaputra and Barak valleys therefore accommodate much larger populations than Karbi Anglong and Dima Hasao.
Soil Fertility
Alluvial soils support rice cultivation, horticulture and other agricultural activities.
This has encouraged dense rural settlement across the major valley floors.
Water Availability
Rivers, streams, wetlands and groundwater provide water for domestic use, irrigation and agriculture.
Agriculture
Agricultural regions support large rural populations.
The connection between settlement and farming can be understood through Assam's agricultural seasons and major crops.
Transport
Settlements tend to become concentrated along:
- highways;
- railways;
- river-crossing points;
- commercial centres; and
- major transport junctions.
Industry and Employment
Oilfields, refineries, tea plantations, cement industries, commercial centres and service-sector employment have created important population concentrations.
Urban Services
Educational institutions, hospitals, administration, markets, banking and transport services attract population toward towns and cities.
Floods and Riverbank Erosion
Flooding can both support fertile agriculture and cause population displacement.
Severe erosion along riverbanks may force households and settlements to relocate.
Population of the Brahmaputra Valley
The Brahmaputra Valley contains the overwhelming majority of Assam's population.
The valley offers:
- extensive flat land;
- fertile alluvial soils;
- abundant water;
- agricultural opportunities;
- tea plantations;
- major towns;
- transport infrastructure; and
- industrial centres.
Settlement is particularly dense around major urban and commercial centres and along transport corridors.
However, density is not uniform even within the valley.
Active river channels, chars, wetlands, flood basins, forests and erosion-prone areas may have much lower or more unstable settlement densities than established alluvial plains.
Population of the Barak Valley
The Barak Valley in southern Assam is another major area of population concentration.
The valley's relatively flat terrain, fertile soils, rice agriculture, tea plantations, road and railway connections and urban centre of Silchar favour comparatively dense settlement.
Settlement is concentrated in:
- Cachar;
- Sribhumi, historically Karimganj; and
- Hailakandi.
The valley's geographical enclosure by surrounding hills limits the amount of level land available for settlement.
As a result, population tends to concentrate strongly along valley floors and transport corridors.
Population of the Hill Regions
Karbi Anglong, West Karbi Anglong and Dima Hasao have generally lower population densities than the major valleys.
The reasons include:
- rugged relief;
- steep slopes;
- larger forest areas;
- dispersed settlements;
- smaller areas of continuous agricultural plains; and
- comparatively limited transport accessibility in some regions.
Population settlements in the hills are often concentrated in:
- valleys;
- plateau surfaces;
- roadside locations;
- administrative centres; and
- areas suitable for agriculture.
Population Density of Assam
Population density measures the number of people living per unit area.
Assam's population density increased substantially during the twentieth century.
| Year | Persons per sq km |
|---|---|
| 1901 | 42 |
| 1951 | 102 |
| 1961 | 138 |
| 1971 | 186 |
| 1991 | 286 |
| 2001 | 340 |
| 2011 | 398 |
The rise from only 42 persons per sq km in 1901 to 398 persons per sq km in 2011 demonstrates the enormous long-term increase in population pressure on Assam's land resources.
Projected Density
If the official 2026 population projection is related mathematically to Assam's geographical area of 78,438 sq km, it is equivalent to approximately 468 persons per sq km.
This is only a projection-based calculation. Assam's latest census-recorded density remains 398 persons per sq km in 2011.
District-wise Population Pattern in Assam
District comparisons require care because Assam's district boundaries have changed substantially since Census 2011.
Several new districts were created after the census, and the Government of Assam now also publishes reconstructed 2011 figures for newer district configurations.
For traditional Census 2011 comparisons using the district boundaries of that census:
| Indicator | Highest | Lowest |
|---|---|---|
| Total Population | Nagaon – 2,823,768 | Dima Hasao – 214,102 |
| Population Density | Kamrup Metropolitan – 2,010 persons/sq km | Dima Hasao – 44 persons/sq km |
| Literacy Rate | Kamrup Metropolitan – 88.66% | Dhubri – 59.36% |
| Sex Ratio | Baksa – 974 | Dima Hasao – 932 |
Rural Population of Assam
Assam remains predominantly rural.
Census 2011 recorded:
- 26,807,034 rural residents; and
- 85.90% of the state's total population living in rural areas.
The 2026 projection gives a rural population of approximately 30.869 million.
Why Is Assam Predominantly Rural?
Important reasons include:
- the importance of agriculture;
- large numbers of villages;
- tea plantations and plantation settlements;
- traditional rural livelihoods;
- river-valley agriculture;
- fishing and wetland-based livelihoods; and
- relatively limited historical urbanisation compared with many industrialised states.
The close relationship between population and agriculture is particularly visible in rice-growing areas, tea belts and riverine plains.
Urban Population of Assam
Census 2011 recorded an urban population of 4,398,542, representing approximately 14.10% of Assam's total population.
This was significantly lower than India's overall urban share at the time.
The official projection gives an urban population of approximately 5.848 million in 2026, equivalent to about 15.9% of the projected state population.
Therefore, Assam remains predominantly rural even though urbanisation is gradually increasing.
Urbanisation in Assam
Urbanisation refers to the increasing proportion of people living in towns and cities and the expansion of urban economic and settlement functions.
Assam's urban share has increased steadily over time.
| Year | Urban Population as % of Total |
|---|---|
| 1901 | 2.34% |
| 1951 | 4.29% |
| 1961 | 7.21% |
| 1971 | 8.82% |
| 1991 | 11.10% |
| 2001 | 12.90% |
| 2011 | 14.10% |
| 2026 Projection | About 15.9% |
Causes of Urbanisation
Urban growth in Assam is driven by:
- administration;
- trade and commerce;
- education;
- healthcare;
- transport;
- industry;
- oil and natural-gas activities;
- construction;
- banking and financial services;
- government employment; and
- migration from rural settlements.
The role of manufacturing, tea, petroleum, natural gas and other economic activities can be explored further through the guide to major industries of Northeast India.
Major Urban Centres of Assam
Guwahati
Guwahati is by far the largest urban concentration in Assam and the most important metropolitan centre of Northeast India.
Its growth has been encouraged by:
- state administration;
- transport connectivity;
- trade and commerce;
- higher education;
- healthcare;
- banking and finance;
- industry;
- construction;
- tourism; and
- regional service functions.
Silchar
Silchar is the principal urban centre of the Barak Valley and serves as an important educational, commercial, medical and transport centre of southern Assam.
Dibrugarh
Dibrugarh is an important centre of Upper Assam associated with tea, petroleum, education, healthcare and trade.
Jorhat
Jorhat functions as an important educational, agricultural, cultural and commercial centre of Upper Assam.
Tinsukia
Tinsukia developed as an important commercial and transport centre within the tea, petroleum and coal-producing region of eastern Assam.
Other Important Towns
Other significant urban centres include:
- Nagaon;
- Tezpur;
- Sivasagar;
- Bongaigaon;
- Diphu;
- North Lakhimpur;
- Dhubri;
- Goalpara;
- Golaghat;
- Haflong; and
- numerous emerging census and statutory towns.
Literacy Rate of Assam
Literacy is an important indicator of human development and population quality.
According to Census 2011, Assam's literacy rate was 72.19%.
| Literacy Indicator | Census 2011 |
|---|---|
| Total Literacy | 72.19% |
| Male Literacy | 77.85% |
| Female Literacy | 66.27% |
| Rural Literacy | 69.34% |
| Urban Literacy | 88.47% |
The figures reveal two important demographic inequalities:
- a gender literacy gap; and
- a significant rural-urban literacy gap.
Male-Female Literacy Gap in Assam
Male literacy in 2011 was 77.85%, compared with female literacy of 66.27%.
The difference was approximately 11.58 percentage points.
The gap reflects differences in access to education that have historically been influenced by:
- household income;
- distance from schools;
- rural accessibility;
- social conditions;
- early withdrawal from education;
- household responsibilities; and
- regional differences in educational infrastructure.
Reducing the gender literacy gap is important because female education is closely related to health, employment, household welfare and demographic transition.
Rural-Urban Literacy Difference
Urban literacy in Assam was 88.47% in Census 2011 compared with rural literacy of 69.34%.
The difference was more than 19 percentage points.
Urban areas generally benefit from:
- greater concentration of schools;
- colleges and universities;
- better transport;
- higher availability of teachers;
- greater access to information;
- stronger labour-market incentives for education; and
- greater proximity to administrative and educational institutions.
However, literacy varies considerably between individual towns and rural districts, so the rural-urban distinction should not be interpreted as uniform.
Sex Ratio of Assam
The sex ratio is defined as the number of females per 1,000 males.
Assam recorded a sex ratio of 958 females per 1,000 males in Census 2011.
This represented a significant improvement from:
- 923 in 1991;
- 935 in 2001; to
- 958 in 2011.
| Year | Females per 1,000 Males |
|---|---|
| 1901 | 919 |
| 1951 | 868 |
| 1971 | 896 |
| 1991 | 923 |
| 2001 | 935 |
| 2011 | 958 |
The long-term figures demonstrate that Assam's sex ratio declined during the first half of the twentieth century but improved substantially in the later decades.
Child Population and Child Sex Ratio
Children aged 0–6 formed an important component of Assam's population in Census 2011.
The total child population was 4,638,130, representing approximately 14.86% of the total population.
It consisted of:
- 2,363,485 boys; and
- 2,274,645 girls.
The child sex ratio was 962 girls per 1,000 boys.
The proportion of children in the population is important because it influences:
- future school enrolment;
- healthcare demand;
- dependency ratios;
- future labour-force size; and
- long-term population growth.
Changing Age Structure of Assam
Population projections indicate that Assam's age structure is gradually changing.
The official projection series shows declining numbers in some younger age groups over the long term while the number and proportion of middle-aged and older residents increase.
This reflects a demographic transition associated with declining fertility and increasing survival.
Demographic Dividend
A large working-age population can provide a demographic dividend when accompanied by:
- education;
- skills;
- employment;
- healthcare;
- investment; and
- productive economic opportunities.
Population Ageing
As fertility falls and life expectancy improves, Assam will also need to plan increasingly for:
- elderly healthcare;
- social security;
- accessible housing;
- age-friendly transport; and
- long-term care.
Population and Agriculture in Assam
The geography of population in Assam remains closely linked to agriculture.
Large rural populations are concentrated in areas suitable for:
- rice cultivation;
- mustard and oilseeds;
- jute;
- vegetables;
- horticulture;
- tea; and
- livestock farming.
The fertile alluvial plains of the Brahmaputra and Barak valleys support dense settlement because agriculture can sustain relatively large rural populations.
For a detailed explanation of this relationship, see Assam Agricultural Seasons and Major Crops.
Population and Industrial Development
Industrial and service-sector development has influenced the location of population in several parts of Assam.
Important employment-generating sectors include:
- tea;
- petroleum and natural gas;
- oil refining;
- petrochemicals;
- fertilizer;
- cement;
- food processing;
- construction;
- transport;
- retail trade;
- education; and
- healthcare.
These activities help explain the growth of centres such as Guwahati, Dibrugarh, Tinsukia, Bongaigaon, Digboi, Duliajan, Numaligarh and other industrial-service settlements.
The wider relationship between resources, employment and settlement is explored in Major Industries of Northeast India.
Population and Environment in Assam
Population geography is closely connected with environmental geography.
Increasing population and settlement expansion create growing demand for:
- land;
- housing;
- roads;
- water;
- energy;
- food;
- construction materials;
- waste disposal; and
- public infrastructure.
Floodplain Settlement
Some of Assam's most fertile and densely settled areas are also highly exposed to floods and riverbank erosion.
This creates a geographical contradiction: the same floodplains that attract settlement because of fertile soils may also expose communities to recurrent hazards.
Urban Expansion
Rapid growth around Guwahati and other towns can place pressure on:
- hills;
- wetlands;
- drainage channels;
- water supply;
- roads; and
- waste-management systems.
Forests and Wildlife
Settlement expansion, roads and land-use change can fragment natural habitats.
This makes careful land-use planning important in a state with exceptionally rich biodiversity and wildlife resources.
Major Population Challenges in Assam
Uneven Population Distribution
Dense settlement in the valleys contrasts strongly with sparse settlement across large hill and forest areas.
This creates very different infrastructure requirements.
Flood and Erosion Displacement
Floods and riverbank erosion can damage houses, agricultural land, roads and community infrastructure, sometimes causing repeated settlement relocation.
Urban Infrastructure Pressure
Growing towns require greater investment in:
- housing;
- public transport;
- water supply;
- sewerage;
- storm-water drainage;
- waste management;
- schools; and
- healthcare.
Employment
A growing working-age population requires sufficient employment opportunities in agriculture, industry and services.
Regional Differences in Literacy
Large differences in literacy between districts and between rural and urban areas affect access to higher education and skilled employment.
Gender Gap in Education
The lower female literacy rate recorded in Census 2011 demonstrates the importance of continued investment in girls' education.
Balancing Population and Natural Resources
Population growth increases demand for land and resources while Assam simultaneously needs to conserve forests, wetlands, wildlife habitats and river systems.
Changing Demographic Trends in Assam
Assam's population geography is gradually moving into a different demographic phase.
Several long-term trends are visible:
- the population continues to grow;
- the rate of growth is slowing;
- fertility is declining;
- sex ratio has improved;
- literacy has increased;
- urban population is increasing;
- the proportion of very young people is gradually changing; and
- the working-age and elderly populations are becoming increasingly important.
Slowing Population Growth
Assam's decadal growth declined from 18.92% in 1991–2001 to 17.07% during 2001–2011.
Current projection series also indicate slower growth in the coming decades.
Urban Transition
The urban share increased from:
2.34% in 1901 → 4.29% in 1951 → 8.82% in 1971 → 12.90% in 2001 → 14.10% in 2011.
The 2026 projection suggests that the share has moved to approximately 15.9%.
Improving Gender Balance
The sex ratio increased from 935 in 2001 to 958 in 2011.
Educational Transition
Literacy increased from 63.25% in 2001 to 72.19% in 2011.
Female literacy showed particularly significant improvement, rising from 54.61% in 2001 to 66.27% in 2011.
Population Geography of Assam: Important Facts for APSC & ADRE
Population geography should be studied together with Assam's physiography, agriculture, industries and settlement geography. Students can practise these topics through the Geography of Assam MCQs for APSC and ADRE.
| Important Question Point | Answer |
|---|---|
| Population of Assam in Census 2011 | 31,205,576 |
| Projected population in 2026 | About 36.717 million |
| Decadal growth rate, 2001–2011 | 17.07% |
| Population density, Census 2011 | 398 persons per sq km |
| Sex ratio, Census 2011 | 958 females per 1,000 males |
| Child sex ratio | 962 |
| Total literacy rate | 72.19% |
| Male literacy rate | 77.85% |
| Female literacy rate | 66.27% |
| Rural literacy rate | 69.34% |
| Urban literacy rate | 88.47% |
| Rural population share | 85.90% in Census 2011 |
| Urban population share | 14.10% in Census 2011 |
| Projected urban population, 2026 | About 5.848 million |
| Projected urban share, 2026 | About 15.9% |
| Largest population district in Census 2011 boundaries | Nagaon |
| Lowest population district in Census 2011 boundaries | Dima Hasao |
| Highest population density in Census 2011 district pattern | Kamrup Metropolitan – 2,010 persons per sq km |
| Lowest population density | Dima Hasao – 44 persons per sq km |
| Highest literacy in Census 2011 district pattern | Kamrup Metropolitan – 88.66% |
| 1981 Census in Assam | The census could not be conducted; historical series use an interpolated population estimate |
Frequently Asked Questions About the Population Geography of Assam
What is the population of Assam?
Assam had a population of 31,205,576 according to Census 2011. The official population projection for 1 March 2026 is approximately 36.717 million. The 2026 figure is a projection rather than a new census count.
What is the population density of Assam?
Assam recorded a population density of 398 persons per sq km in Census 2011.
What is the sex ratio of Assam?
The Census 2011 sex ratio of Assam was 958 females per 1,000 males.
What is the literacy rate of Assam?
The overall literacy rate of Assam was 72.19% according to Census 2011.
What is the male literacy rate of Assam?
Male literacy was 77.85% in Census 2011.
What is the female literacy rate of Assam?
Female literacy was 66.27% in Census 2011.
What percentage of Assam's population is rural?
Approximately 85.90% of Assam's population lived in rural areas according to Census 2011.
What percentage of Assam's population is urban?
Approximately 14.10% of Assam's population lived in urban areas in Census 2011. Based on official projections, the urban share is approximately 15.9% in 2026.
Why is Assam's population unevenly distributed?
The population is unevenly distributed because relief, soil fertility, agriculture, rivers, transport, industry, forests, floods and urban centres differ considerably across the state. The alluvial valleys support much denser settlement than the rugged hill districts.
Which region of Assam is most densely populated?
The Brahmaputra and Barak valley plains contain the main population concentrations, while major urban areas such as Guwahati have particularly high densities.
Which district had the highest population density in Census 2011?
Under the district boundaries used for Census 2011, Kamrup Metropolitan had the highest density at approximately 2,010 persons per sq km.
Which district had the lowest population density in Census 2011?
Dima Hasao had the lowest density, with approximately 44 persons per sq km.
Which district had the highest literacy rate in Census 2011?
Under the Census 2011 district configuration, Kamrup Metropolitan recorded the highest overall literacy rate at approximately 88.66%.
Why is Guwahati the largest urban centre of Assam?
Guwahati combines administrative, commercial, educational, transport, healthcare, industrial and service functions and acts as the principal gateway to Northeast India.
Was Census 1981 conducted in Assam?
No. The 1981 population census could not be conducted in Assam. Historical population series therefore use an interpolated population estimate for that year.
Is the 2026 population figure a census figure?
No. The figure of approximately 36.717 million is an official population projection. Census 2011 remains the latest completed population census, while Census 2027 is now under implementation.
Conclusion
The population geography of Assam reflects the close relationship between people and the state's physical and economic environment.
Assam's population increased from about 3.29 million in 1901 to 31.21 million in 2011. Official projections place the population at approximately 36.72 million in 2026, although this is not a census count.
The population is highly unevenly distributed. The fertile Brahmaputra and Barak valley plains contain dense rural and urban settlements, while the rugged hill regions of Karbi Anglong and Dima Hasao generally have much lower population densities.
The long-term rise in density—from only 42 persons per sq km in 1901 to 398 in 2011—shows the growing pressure on land and infrastructure.
Assam remains predominantly rural, but urbanisation is gradually increasing. The urban share rose from only 2.34% in 1901 to 14.10% in 2011, while the 2026 projection indicates a share of around 15.9%.
Literacy has also improved significantly. The overall literacy rate reached 72.19% in 2011, although substantial differences remained between men and women and between rural and urban populations.
The sex ratio improved from 935 females per 1,000 males in 2001 to 958 in 2011, while long-term population projections suggest further movement toward gender balance.
The future demographic geography of Assam will increasingly be shaped by slower population growth, urban expansion, changing age structure, education, employment, migration, flood-related displacement and pressure on land and natural resources.
Understanding these patterns is essential not only for geography but also for planning housing, transport, education, health services, employment, disaster management and sustainable development across Assam.
References
Office of the Registrar General & Census Commissioner, India. Census of India 2011 – Assam. Primary source for population, growth, density, literacy, sex ratio, rural-urban population and district demographic indicators.
Office of the Registrar General & Census Commissioner, India. Population Projections for India and States, 2011–2036. Used for projected population, sex composition, rural-urban population and age structure.
Directorate of Economics and Statistics, Government of Assam. Statistical Handbook, Assam 2025. Used for Census 2011 demographic indicators and official population projections through 2036.
Directorate of Economics and Statistics, Government of Assam. Assam at a Glance 2025 and 2026. Used to cross-check population, literacy, density, rural-urban population and other demographic statistics.
Directorate of Economics and Statistics, Government of Assam. Economic Survey of Assam. Used for demographic trends and district-level Census 2011 comparisons.
Census of India. A-02: Decadal Variation in Population 1901–2011, Assam. Used for historical population growth.
Office of the Registrar General & Census Commissioner, India. Census 2027 notifications and official Census programme. Used to clarify the current census status.
Research Note: Census 2011 remains the latest completed population census for which final population, literacy, sex ratio, density and urbanisation figures are available for Assam. The 2026 total of approximately 36.717 million is an official projection for 1 March 2026 and not an enumerated population count. District comparisons based on Census 2011 also require caution because Assam's district boundaries have subsequently been reorganised.