District of Bihar

Siwan District Population 2026

Q: What is the population of Siwan district in 2026?

Our estimate for 1 March 2026 is ≈41,60,000 (41.6 lakh). It is not an official figure: it applies Siwan's 2001–2011 trend, damped, to the official Bihar projection (method M1). Census 2011 counted 33,30,464.

Q: What was the population of Siwan district in Census 2011?

33,30,464: 16,75,090 males and 16,55,374 females, of whom 1,82,913 lived in towns and 31,47,551 in villages.

Population · 1 March 2026

≈ 41.6 lakh Estimate Our estimate, method M1, constrained to the official state projection 1 March 2026 How this is made →

41,60,000 4.16 million 1 March 2026

Siwan district's population is estimated at ≈41.6 lakh (41,60,000) on 1 March 2026. This is our estimate, tied to the official Bihar projection; Census 2011, the last count, recorded 33,30,464.

Estimate: method M1, constrained to the RGI projection for Bihar. Census: ORGI.

Which number do you mean?

District totals include villages. Here is how the 2011 population splits between towns and villages.

District

Siwan district

Census 2011: 33,30,464
2026 Estimate Our estimate, method M1, constrained to the official state projection How this is made →: ≈ 41.6 lakh

Urban population

Towns (urban)

Census 2011: 1,82,913

Rural

Villages (rural)

Census 2011: 31,47,551

Key figures

Population 2026: ≈ 41.6 lakh 41,60,000 Estimate Our estimate, method M1, constrained to the official state projection How this is made →
Census 2011: 33.3 lakh 33,30,464 Census 2011 Final count, Census of India 2011 (ORGI) How this is made →
Density: 1,501per km² 2011
Sex ratio: 988 Bihar: 918
Child sex ratio (0–6): 940 Bihar: 935
Literacy rate: 69.5% Male 80.2% · Female 58.7%
Urban share: 5.5% Bihar: 11.3%
Growth 2001–11: +22.7% Bihar: +25.4%
Area: 2,219km² Census 2011
Households: 5.36 lakh 6.2 people per household
Villages: 1,530 Census 2011
Towns: 3 Census 2011

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Density · Bihar

Population over time

Census counts on 2011 boundaries, then our estimate to 2036.

Census
Estimate

46 L 2026

› Show the numbers as a table

Year	Population
1951	10,77,453
1961	12,13,268
1971	14,62,067
1981	17,78,930
1991	21,70,971
2001	27,14,349
2011	33,30,464
2016 *	36,32,000
2021 *	38,94,000
2026 *	41,60,000
2031 *	44,11,000
2036 *	46,20,000

* Estimate

How Siwan's 2011 population was spread

Sub-districts (tehsils, talukas, mandals or blocks) as they were in Census 2011. “Part” means only some of it now lies in this district.

How Siwan's 2011 population was spread
#
1	Siwan	3,40,983	10.2%	940	74.5%	39.6%
2	Barharia	3,21,292	9.6%	957	68.9%	0.0%
3	Goriakothi	2,23,709	6.7%	1012	67.2%	0.0%
4	Bhagwanpur Hat	2,20,651	6.6%	978	70.3%	0.0%
5	Pachrukhi	2,01,759	6.1%	984	69.5%	0.0%
6	Maharajganj	1,90,217	5.7%	1019	68.5%	12.8%
7	Hussainganj	1,82,794	5.5%	965	69.0%	0.0%
8	Darauli	1,74,357	5.2%	990	69.1%	0.0%
9	Daraundha	1,73,200	5.2%	1021	68.8%	0.0%
10	Ziradei	1,63,752	4.9%	1010	70.5%	0.0%
11	Raghunathpur	1,57,694	4.7%	1022	68.2%	0.0%
12	Siswan	1,53,953	4.6%	982	68.5%	0.0%
13	Hasanpura	1,49,580	4.5%	1047	68.4%	0.0%
14	Lakri Nabiganj	1,28,899	3.9%	1024	64.5%	0.0%
15	Guthani	1,28,155	3.8%	994	71.0%	0.0%
16	Mairwa	1,13,499	3.4%	959	71.5%	20.8%
17	Andar	1,10,027	3.3%	1020	69.2%	0.0%
18	Basantpur	1,05,229	3.2%	958	67.7%	0.0%
19	Nautan	90,714	2.7%	978	68.7%	0.0%

Largest towns in Siwan (Census 2011)

Siwan 1,35,066
Maharajganj 24,282
Mairwa 23,565

How people in Siwan worked (Census 2011)

Cultivators

28.4%

Agricultural labourers

40.4%

Household industry

3.4%

Other work

27.9%

Share of all workers, main and marginal. Work participation: 28.0%.

Age structure of Siwan

Population in five-year age groups, Census 2011. Men on the left, women on the right. Census 2011 Census 2011, as published. How this is made →

MenWomen

80+
75-79
70-74
65-69
60-64
55-59
50-54
45-49
40-44
35-39
30-34
25-29
20-24
15-19
10-14
5-9
0-4

› Show the numbers as a table

Age	Men	Women
0-4	1,84,338	1,75,192
5-9	2,37,404	2,22,236
10-14	2,37,207	2,27,858
15-19	1,82,602	1,68,288
20-24	1,30,831	1,19,185
25-29	1,08,792	1,21,515
30-34	98,616	1,16,510
35-39	96,062	1,06,426
40-44	81,112	80,523
45-49	65,237	69,111
50-54	55,520	50,352
55-59	40,951	53,229
60-64	56,062	55,750
65-69	40,408	38,875
70-74	31,477	25,000
75-79	12,147	10,683
80+	14,549	13,296

Children (0–14): 38.6%; Bihar 40.2%
Working age (15–59): 52.4%; Bihar 52.3%
Older people (60+): 9.0%; Bihar 7.4%
Median age: 20.6years; Bihar 20.4
Dependency ratio: 79.2; children and 65+ per 100 aged 15–64; Bihar 81.0

Languages spoken in Siwan

Share of people by mother tongue, grouped into languages as the Census does. 23 languages recorded. Census 2011 Census 2011, as published. How this is made →

Hindi 95.6%
Urdu 4.3%
Bengali 0.1%
Kurukh/Oraon 0.0%
Others 0.0%
Maithili 0.0%
Arabic/Arbi 0.0%
Sindhi 0.0%

Largest mother tongues

Bhojpuri93.4%
Urdu4.3%
Hindi2.1%
Bengali0.1%
Kurukh/Oraon0.0%
Maithili0.0%
Marwari0.0%
Arabic/Arbi0.0%

Housing and amenities in Siwan

Share of households, Houselisting Census 2011. Census 2011 Census 2011, as published. How this is made →

Basic services

Electricity for lighting 9.7%

Bihar 16.4%
Tap water 3.5%

Bihar 4.4%
Water source within premises 65.9%

Bihar 50.1%
Toilet within premises 22.9%

Bihar 23.1%
Open defecation (no latrine) (Lower is better for this one.) 76.0%

Bihar 75.8%
Bathing area within premises 50.8%

Bihar 37.5%
Closed drainage 9.3%

Bihar 6.7%
Cooking with LPG/PNG 7.8%

Bihar 8.1%
Cooking with wood, crop waste or dung (Lower is better for this one.) 91.0%

Bihar 88.9%

What households own

Mobile phone 71.0%

Bihar 53.2%
Television 13.6%

Bihar 14.5%
Scooter or motorcycle 11.8%

Bihar 8.1%
Computer or laptop 6.9%

Bihar 7.1%
Car, jeep or van 2.0%

Bihar 1.7%
Use banking services 73.9%

Bihar 44.4%
None of the listed assets (Lower is better for this one.) 11.2%

Bihar 25.6%

The home itself

Own their home 98.2%

Bihar 96.8%
Rent their home 1.2%

Bihar 2.1%
Permanent (pucca) house 80.5%

Bihar 48.0%
House in good condition 45.9%

Bihar 36.1%
Concrete roof 28.8%

Bihar 23.8%
Cement or tiled floor 19.4%

Bihar 15.2%
One room or less (Lower is better for this one.) 39.1%

Bihar 47.7%

Bihar

What the numbers say

Siwan district held 3.2% of Bihar's population in 2011, 12th of 38 districts.
Literacy is 69.5%, 7.7 points above the Bihar average of 61.8%.
The gender gap in literacy is wide: 80.2% of men but only 58.7% of women could read and write in 2011.
The sex ratio of 988 females per 1,000 males is higher than the state's 918.
5.5% of residents lived in towns in 2011, more rural than Bihar as a whole (11.3%).
The population grew 22.7% in 2001–11, slower than Bihar's 25.4%.
Our 2026 estimate, ≈41.6 lakh, implies growth of about 25% since 2011; it is tied to the official Bihar projection.
Its largest town, Siwan, had 1.35 lakh people in 2011, 4.1% of the district.

Compare with

All districts of Bihar →

Census 2027 status

Results pending

Phase I: houselisting

Done (2 May 2026 – 31 May 2026)
Phase II: counting people

February 2027 (reference date 1 March 2027)
Results

Not yet released. In 2011, first figures came about a month after counting ended.

When the Registrar General publishes Census 2027 figures for Siwan, they will appear on this page, at this address. Census 2027 explained →

Population by religion in Siwan (Census 2011)

Official figures as published by the Office of the Registrar General. Shown without commentary. Census 2011 Census 2011, as published. How this is made →

Population by religion in Siwan (Census 2011)
Religion	Persons	Share	Bihar
Hindu	27,12,635	81.4%	82.7%
Muslim	6,08,282	18.3%	16.9%
Christian	2,618	0.1%	0.1%
Sikh	369	0.0%	0.0%
Buddhist	407	0.0%	0.0%
Jain	359	0.0%	0.0%
Other religions and persuasions	86	0.0%	0.0%
Religion not stated	5,708	0.2%	0.2%
Total	33,30,464	100%

Frequently asked questions

What is the population of Siwan district in 2026?

Our estimate for 1 March 2026 is ≈41,60,000 (41.6 lakh). It is not an official figure: it applies Siwan's 2001–2011 trend, damped, to the official Bihar projection (method M1). Census 2011 counted 33,30,464.

What was the population of Siwan district in Census 2011?

33,30,464: 16,75,090 males and 16,55,374 females, of whom 1,82,913 lived in towns and 31,47,551 in villages.

What is the literacy rate and sex ratio of Siwan?

Literacy was 69.5% in 2011 (men 80.2%, women 58.7%). The sex ratio was 988 females per 1,000 males, and 940 among children aged 0–6.

Which is the largest town in Siwan district?

Siwan, with 1,35,066 people in Census 2011.

How many villages and towns are in Siwan district?

On today's boundaries the district contains 1,530 Census 2011 villages and 3 towns.

⤓ Download Bihar district data (CSV)

Sources and method

Data updated: 4 October 2026 · Report a correction