Bihar, in 2026 estimates.
All 38 districts, using UNFPA’s projection for 1 March 2026. These are modelled estimates. The last Census count shown here remains a separate 2011 benchmark.
Bihar · 2026 state projection13.23 crore
Bihar · Census 201110.41 crore
District estimates38
Reference date1 Mar 2026
38 districts · projection date 1 March 2026
| District | 2026 estimate | 2011 Census count | 2021–26 model pace | Source |
|---|---|---|---|---|
| Patna | 73.42 lakh | 58,38,465 | 1.38% / year | UNFPA table ↗ |
| East Champaran | 67.2 lakh | 50,99,371 | 1.69% / year | UNFPA table ↗ |
| Muzaffarpur | 62.14 lakh | 48,01,062 | 1.57% / year | UNFPA table ↗ |
| Madhubani | 56.66 lakh | 44,87,379 | 1.41% / year | UNFPA table ↗ |
| Gaya | 56.58 lakh | 43,91,418 | 1.54% / year | UNFPA table ↗ |
| Samastipur | 53.6 lakh | 42,61,566 | 1.38% / year | UNFPA table ↗ |
| West Champaran | 51.93 lakh | 39,35,042 | 1.7% / year | UNFPA table ↗ |
| Saran | 48.1 lakh | 39,51,862 | 1.15% / year | UNFPA table ↗ |
| Darbhanga | 47.62 lakh | 39,37,385 | 1.11% / year | UNFPA table ↗ |
| Vaishali | 45.38 lakh | 34,95,021 | 1.6% / year | UNFPA table ↗ |
| Sitamarhi | 44.89 lakh | 34,23,574 | 1.66% / year | UNFPA table ↗ |
| Purnia | 43.3 lakh | 32,64,619 | 1.74% / year | UNFPA table ↗ |
| Siwan | 40.79 lakh | 33,30,464 | 1.2% / year | UNFPA table ↗ |
| Katihar | 40.29 lakh | 30,71,029 | 1.66% / year | UNFPA table ↗ |
| Bhagalpur | 38.38 lakh | 30,37,766 | 1.41% / year | UNFPA table ↗ |
| Begusarai | 38.18 lakh | 29,70,541 | 1.53% / year | UNFPA table ↗ |
| Araria | 37.72 lakh | 28,11,569 | 1.81% / year | UNFPA table ↗ |
| Rohtas | 35.65 lakh | 29,59,918 | 1.08% / year | UNFPA table ↗ |
| Nalanda | 34.02 lakh | 28,77,653 | 0.95% / year | UNFPA table ↗ |
| Bhojpur | 33.08 lakh | 27,28,407 | 1.13% / year | UNFPA table ↗ |
| Aurangabad | 32.69 lakh | 25,40,073 | 1.53% / year | UNFPA table ↗ |
| Gopalganj | 30.35 lakh | 25,62,012 | 0.96% / year | UNFPA table ↗ |
| Supaul | 29.15 lakh | 22,29,076 | 1.64% / year | UNFPA table ↗ |
| Nawada | 27.84 lakh | 22,19,146 | 1.36% / year | UNFPA table ↗ |
| Madhepura | 26.74 lakh | 20,01,762 | 1.79% / year | UNFPA table ↗ |
| Banka | 25.77 lakh | 20,34,763 | 1.43% / year | UNFPA table ↗ |
| Saharsa | 24.58 lakh | 19,00,661 | 1.57% / year | UNFPA table ↗ |
| Jamui | 22.73 lakh | 17,60,405 | 1.56% / year | UNFPA table ↗ |
| Kishanganj | 22.59 lakh | 16,90,400 | 1.78% / year | UNFPA table ↗ |
| Khagaria | 22.11 lakh | 16,66,886 | 1.74% / year | UNFPA table ↗ |
| Kaimur | 21.19 lakh | 16,26,384 | 1.62% / year | UNFPA table ↗ |
| Buxar | 20.95 lakh | 17,06,352 | 1.22% / year | UNFPA table ↗ |
| Munger | 16.08 lakh | 13,67,765 | 0.91% / year | UNFPA table ↗ |
| Jehanabad | 13.85 lakh | 11,25,313 | 1.23% / year | UNFPA table ↗ |
| Lakhisarai | 12.47 lakh | 10,00,912 | 1.31% / year | UNFPA table ↗ |
| Sheohar | 8.65 lakh | 6,56,246 | 1.69% / year | UNFPA table ↗ |
| Arwal | 8.32 lakh | 7,00,843 | 0.98% / year | UNFPA table ↗ |
| Sheikhpura | 7.67 lakh | 6,36,342 | 1.09% / year | UNFPA table ↗ |
The annual pace is derived from the source’s two projections: ((2026 ÷ 2021)^(1/5) − 1) × 100. It is not an observed annual growth rate. Lakh values are rounded to two decimals; the source integers remain in the download.
State input: 13,22,65,000 people, converted from a table in thousands. Published district totals sum to 13,22,65,997, a difference of 997 people. Neither source total has been silently changed.