Demographics of Bihar Districts wise 
 District 
  
 Demographics 
 http://gov.bih.nic.in/Profile/Annexure-01.htm Population Distribution, Percentage Decadal Growth Rate, Sex-Ratio and Population Density

| Districts_of_Bihar | Total_Population_2001 | Male_Population_2001 | Female_Population_2001 | Growth_Rate_1981_91 | Growth_Rate_1991_01 | Sex_Ratio_1991 | Sex_Ratio_2001 | Population_density_1991 | Population_density_2001 |
|---|---|---|---|---|---|---|---|---|---|
| Begusarai | 2342989 | 1226057 | 1116932 | 24.61 | 29.11 | 898 | 911 | 946 | 1222 |
| Khagaria | 1276677 | 675501 | 601176 | 28.44 | 29.32 | 868 | 890 | 664 | 859 |
| Bhagalpur | 2430331 | 1294192 | 1136139 | 20.67 | 27.24 | 864 | 878 | 743 | 946 |
| Banka | 1608778 | 843061 | 765717 | 24.44 | 24.47 | 893 | 908 | 428 | 533 |
| Munger | 1135499 | 604662 | 530837 | 17.79 | 20.34 | 856 | 878 | 665 | 800 |
| Lakhisarai | 801173 | 416727 | 384446 | 21.08 | 23.94 | 880 | 923 | 526 | 652 |
| Sheikhpura | 525137 | 273468 | 251669 | 19.84 | 24.96 | 896 | 920 | 610 | 762 |
| Nalanda | 2368327 | 1236467 | 1131860 | 21.73 | 18.64 | 898 | 915 | 848 | 1006 |
| Patna | 4709851 | 2514949 | 2194902 | 19.84 | 30.17 | 867 | 873 | 1130 | 1471 |
| Bhojpur | 2233415 | 1175333 | 1058082 | 20.26 | 24.58 | 904 | 900 | 725 | 903 |
| Buxar | 1403462 | 738239 | 665223 | 18.63 | 29.03 | 884 | 901 | 670 | 864 |