Pashchim Champaran

With 39,35,042 people at the 2011 Census, Pashchim Champaran was the 64th most populous of India's 640 districts and the 9th most populous of Bihar's 38. That is 3.8% of everyone living in Bihar at the time.

Literacy stood at 55.70%, 17.3 points below the national 72.98% — 6.1 points below the Bihar average. That ranked it 605th of 640 districts nationally. The gap between male and female literacy was 20.9 points, 4.6 points above the national gap of 16.3.

The sex ratio was 909 women per 1,000 men (9 below the Bihar figure of 918). Among children aged 0–6 the ratio was 953, 35 above the national 918.

37.6% of the population were recorded as workers, 4.2 points above the Bihar rate. Female work participation was 25.6%, 6.5 points above the state figure.

Pashchim Champaran contained 8 towns — 5 with a municipal body of some kind, and 3 classed as census towns, meaning they met the census's urban test without having one. The largest was Bettiah (Nagar Parishad), with 1,32,209 people. That put 10.0% of the district in urban areas, 1.3 points below the Bihar share of 11.3%.