As per the report of The Technical Group by the National Commission, The population of Bihar is projected to be 127,368,000 or 127.4 million or 12.7 crores as of July 1, 2023. Bihar is the 2nd most populous state in india. Bihar’s population is projected to reach 14.9 cr in 2036.

The size of the population of Bihar is equivalent to Ethiopia, the 11th most populous country in the world. Only one country in South America, Europe and Africa have more people than Bihar.

In 2023, the sex ratio of the total population in Bihar is 108.138 males per 100 females. There are 66,174,000 or 66.1 million or 6.61 cr males and 61,194,000 or 61.2 million or 6.12 cr females in Bihar. Bihar has 4,980,000 or 4.98 mn more males than females.

Bihar accounts for 9.15 percent of the India population, that is highest since 1901. Population growth rate for 2023 is projected at 1.46 % with addition of 1.84 mn more people.

According to the Census of India 2011, the population of the state of Bihar was 10.41 cr, increasing from 8.30 cr in 2001. There were 54,278,157 males and 49,821,295 females, with a sex ratio of 108.946 males per 100 females. The percentage decadal growth during 2001-2011 was 25.42%, 3.2% lower than 1991-2001 period. Population of Bihar had increased by 21.1 million during the decade 2001-2011.

Population of Bihar, which at the turn of the twentieth century, was around 21.24 million increased by approx six times in a period of 122 years to reach 127.4 million at 2023.

Bihar Population (2011-2036)

Year Population Growth Share (%)
TotalMaleFemaleNet Changerate (%)India
2011104,771,00054,624,00050,147,000--8.61
2012106,787,00055,663,00051,123,0002,016,0001.9248.67
2013108,802,00056,702,00052,099,0002,015,0001.8878.72
2014110,817,00057,741,00053,076,0002,015,0001.8528.77
2015112,832,00058,780,00054,052,0002,015,0001.8188.81
2016114,770,00059,776,00054,994,0001,938,0001.7188.86
2017116,551,00060,683,00055,868,0001,781,0001.5528.90
2018118,333,00061,591,00056,741,0001,782,0001.5298.93
2019120,114,00062,499,00057,615,0001,781,0001.5058.97
2020121,895,00063,407,00058,489,0001,781,0001.4839.01
2021123,695,00064,321,00059,374,0001,800,0001.4779.05
2022125,532,00065,247,00060,284,0001,837,0001.4859.10
2023127,368,00066,174,00061,194,0001,836,0001.4639.15
2024129,205,00067,101,00062,104,0001,837,0001.4429.20
2025131,041,00068,027,00063,014,0001,836,0001.4219.24
2026132,850,00068,938,00063,912,0001,809,0001.3809.29
2027134,605,00069,818,00064,787,0001,755,0001.3219.35
2028136,361,00070,698,00065,662,0001,756,0001.3059.40
2029138,116,00071,578,00066,537,0001,755,0001.2879.45
2030139,871,00072,458,00067,412,0001,755,0001.2719.50
2031141,543,00073,295,00068,248,0001,672,0001.1959.55
2032143,050,00074,045,00069,005,0001,507,0001.0659.60
2033144,557,00074,796,00069,761,0001,507,0001.0539.64
2034146,064,00075,546,00070,518,0001,507,0001.0429.69
2035147,571,00076,296,00071,275,0001,507,0001.0329.73
2036149,078,00077,047,00072,031,0001,507,0001.0219.77
  • Population
  • Growth rate
  • Net change

Bihar Population (1901-2011)

Year Population Growth Share (%)
Net Changerate (%)to India
190121,243,632--8.91
191121,567,159323,5271.528.56
192121,358,905-208,254-0.978.50
193123,438,3712,079,4669.748.40
194126,302,7712,864,40012.228.25
195129,085,0172,782,24610.588.05
196134,840,9685,755,95119.797.93
197142,126,2367,285,26820.917.69
198152,302,66510,176,42924.167.65
199164,530,55412,227,88923.387.62
200182,998,50918,467,95528.628.07
2011104,099,45221,100,94325.428.60

Bihar population by Age Group (2011)

Age group Male Female Total M per 100 F
PersonsShare (%)
00-04 6,576,871 6,188,158 12,765,029 12.26 106.282
05-09 7,796,359 7,239,918 15,036,277 14.44 107.686
10-14 7,323,831 6,596,051 13,919,882 13.37 111.034
15-19 5,290,581 4,182,114 9,472,695 9.10 126.505
20-24 4,210,585 3,854,150 8,064,735 7.75 109.248
25-29 3,828,687 3,843,018 7,671,705 7.37 99.627
30-34 3,510,596 3,545,141 7,055,737 6.78 99.026
35-39 3,308,161 3,149,100 6,457,261 6.20 105.051
40-44 2,756,809 2,408,883 5,165,692 4.96 114.443
45-49 2,209,994 2,060,380 4,270,374 4.10 107.261
50-54 1,808,425 1,504,315 3,312,740 3.18 120.216
55-59 1,330,356 1,466,322 2,796,678 2.69 90.727
60-64 1,559,925 1,448,083 3,008,008 2.89 107.723
65-69 1,103,718 986,061 2,089,779 2.01 111.932
70-74 784,383 595,148 1,379,531 1.33 131.796
75-79 297,973 252,506 550,479 0.53 118.006
80-84 197,997 171,057 369,054 0.35 115.749
85-89 69,258 60,250 129,508 0.12 114.951
90-94 48,853 45,915 94,768 0.09 106.399
95-99 24,996 22,379 47,375 0.05 111.694
100+ 19,490 19,153 38,643 0.04 101.760
Age not stated 220,309 183,193 403,502 0.39 120.261
Total 54,278,157 49,821,295 104,099,452 108.946
  • Population pyramid
  • Gender ratio

Population of Bihar districts 2011

District Rank Population Rural (%) Urban (%) Sex ratio
MaleFemaleTotalShare (%)F per 1000 MM per 100 F
Pashchim Champaran92,061,1101,873,9323,935,0423.7890.019.99909109.989
Purba Champaran22,681,2092,418,1625,099,3714.9092.137.87902110.878
Sheohar37346,673309,573656,2460.6395.724.28893111.984
Sitamarhi111,803,2521,620,3223,423,5743.2994.445.56899111.290
Madhubani42,329,3132,158,0664,487,3794.3196.403.60926107.935
Supaul231,155,2831,073,7932,229,0762.1495.264.74929107.589
Araria191,463,3331,348,2362,811,5692.7094.006.00921108.537
Kishanganj30866,970823,4301,690,4001.6290.479.53950105.288
Purnia131,699,3701,565,2493,264,6193.1489.4910.51921108.569
Katihar141,600,4301,470,5993,071,0292.9591.088.92919108.828
Madhepura261,047,559954,2032,001,7621.9295.584.42911109.784
Saharsa27997,174903,4871,900,6611.8391.768.24906110.369
Darbhanga82,059,9491,877,4363,937,3853.7890.269.74911109.721
Muzaffarpur32,527,4972,273,5654,801,0624.6190.149.86900111.169
Gopalganj211,267,6661,294,3462,562,0122.4693.656.351,02197.939
Siwan121,675,0901,655,3743,330,4643.2094.515.49988101.191
Saran72,022,8211,929,0413,951,8623.8091.068.94954104.861
Vaishali101,844,5351,650,4863,495,0213.3693.336.67895111.757
Samastipur62,230,0032,031,5634,261,5664.0996.533.47911109.768
Begusarai161,567,6601,402,8812,970,5412.8580.8219.18895111.746
Khagaria31883,786783,1001,666,8861.6094.775.23886112.857
Bhagalpur151,615,6631,422,1033,037,7662.9280.1719.83880113.611
Banka251,067,140967,6232,034,7631.9596.503.50907110.285
Munger33729,041638,7241,367,7651.3172.2127.79876114.140
Lakhisarai35526,345474,5671,000,9120.9685.7114.29902110.911
Sheikhpura38329,743306,599636,3420.6182.8717.13930107.549
Nalanda181,497,0601,380,5932,877,6532.7684.0915.91922108.436
Patna13,078,5122,759,9535,838,4655.6156.9343.07897111.542
Bhojpur201,430,3801,298,0272,728,4072.6285.7114.29907110.196
Buxar29887,977818,3751,706,3521.6490.369.64922108.505
Kaimur (Bhabua)32847,006779,3781,626,3841.5695.974.03920108.677
Rohtas171,543,5461,416,3722,959,9182.8485.5514.45918108.979
Aurangabad221,318,6841,221,3892,540,0732.4490.689.32926107.966
Gaya52,266,5662,124,8524,391,4184.2286.7613.24937106.669
Nawada241,144,6681,074,4782,219,1462.1390.299.71939106.532
Jamui28916,064844,3411,760,4051.6991.748.26922108.495
Jehanabad 34585,582539,7311,125,3131.0887.9912.01922108.495
Arwal36363,497337,346700,8430.6792.607.40928107.752