Sex Ratio
| State/District | Persons | Male | Female | Sex ratio (female per 1000 male) | Density (Per sq.km) | Decadal growth rate) |
|---|---|---|---|---|---|---|
| Bihar | 10,40,99,452 | 5,42,78,157 | 4,98,21,295 | 918 | 1106 | 25.42 |
| Araria | 28,11,569 | 14,63,333 | 13,48,236 | 921 | 993 | 30.25 |
| Arwal | 7,00,843 | 3,63,497 | 3,37,346 | 928 | 1098 | 18.89 |
| Aurangabad | 25,40,073 | 13,18,684 | 12,21,389 | 926 | 769 | 26.18 |
| Banka | 20,34,763 | 10,67,140 | 9,67,623 | 907 | 674 | 26.48 |
| Begusarai | 29,70,541 | 15,67,660 | 14,02,881 | 895 | 1549 | 26.44 |
| Bhagalpur | 30,37,766 | 16,15,663 | 14,22,103 | 880 | 1182 | 25.36 |
| Bhojpur | 27,28,407 | 14,30,380 | 12,98,027 | 907 | 1139 | 21.63 |
| Buxar | 17,06,352 | 8,87,977 | 8,18,375 | 922 | 1002 | 21.67 |
| Darbhanga | 39,37,385 | 20,59,949 | 18,77,436 | 911 | 1728 | 19.47 |
| Purvi Champaran | 50,99,371 | 26,81,209 | 24,18,162 | 902 | 1285 | 29.43 |
| Gaya | 43,91,418 | 22,66,566 | 21,24,852 | 937 | 883 | 26.43 |
| Gopalganj | 25,62,012 | 12,67,666 | 12,94,346 | 1,021 | 1260 | 19.02 |
| Jamui | 17,60,405 | 9,16,064 | 8,44,341 | 922 | 568 | 25.85 |
| Jehanabad | 11,25,313 | 5,85,582 | 5,39,731 | 922 | 1209 | 21.68 |
| Khagaria | 16,66,886 | 8,83,786 | 7,83,100 | 886 | 1122 | 30.19 |
| Kishanganj | 16,90,400 | 8,66,970 | 8,23,430 | 950 | 897 | 30.40 |
| Kaimur (Bhabua) | 16,26,384 | 8,47,006 | 7,79,378 | 920 | 488 | 26.17 |
| Katihar | 30,71,029 | 16,00,430 | 14,70,599 | 919 | 1005 | 28.35 |
| Lakhisarai | 10,00,912 | 5,26,345 | 4,74,567 | 902 | 815 | 24.77 |
| Madhubani | 44,87,379 | 23,29,313 | 21,58,066 | 926 | 1282 | 25.51 |
| Munger | 13,67,765 | 7,29,041 | 6,38,724 | 876 | 964 | 20.21 |
| Madhepura | 20,01,762 | 10,47,559 | 9,54,203 | 911 | 1120 | 31.12 |
| Muzaffarpur | 48,01,062 | 25,27,497 | 22,73,565 | 900 | 1514 | 28.14 |
| Nalanda | 28,77,653 | 14,97,060 | 13,80,593 | 922 | 1222 | 21.39 |
| Nawada | 22,19,146 | 11,44,668 | 10,74,478 | 939 | 890 | 22.63 |
| Patna | 58,38,465 | 30,78,512 | 27,59,953 | 897 | 1823 | 23.73 |
| Purnia | 32,64,619 | 16,99,370 | 15,65,249 | 921 | 1011 | 28.33 |
| Rohtas | 29,59,918 | 15,43,546 | 14,16,372 | 918 | 763 | 20.78 |
| Saharsa | 19,00,661 | 9,97,174 | 9,03,487 | 906 | 1127 | 26.02 |
| Samastipur | 42,61,566 | 22,30,003 | 20,31,563 | 911 | 1467 | 25.53 |
| Sheohar | 6,56,246 | 3,46,673 | 3,09,573 | 893 | 1880 | 27.19 |
| Sheikhpura | 6,36,342 | 3,29,743 | 3,06,599 | 930 | 924 | 21.09 |
| Saran | 39,51,862 | 20,22,821 | 19,29,041 | 954 | 1496 | 21.64 |
| Sitamarhi | 34,23,574 | 18,03,252 | 16,20,322 | 899 | 1492 | 27.62 |
| Supaul | 22,29,076 | 11,55,283 | 10,73,793 | 929 | 919 | 28.66 |
| Siwan | 33,30,464 | 16,75,090 | 16,55,374 | 988 | 1501 | 22.70 |
| Vaishali | 34,95,021 | 18,44,535 | 16,50,486 | 895 | 1717 | 28.57 |
| Pashchim Champaran | 39,35,042 | 20,61,110 | 18,73,932 | 909 | 753 | 29.29 |
