East Champaran , is an administrative district in the state of Bihar in India. The district headquarters are located at Motihari.

The district occupies an area of 3969 km2 and has a population of 3,933,636 (as of 2001). East Champaran is a part of Tirhut Division (Tirhut). It is currently a part of the Red Corridor.

As of 2011, it is the second most populous district of Bihar (out of 39), after Patna.

East Champaran district occupies an area of 3,968 square kilometres (1,532 sq mi), comparatively equivalent to Vanuatu’s Espiritu Santo.Gandak, Burhi Gandak and Baghmati are important rivers flowing through this region.

According to the 2011 census East Champaran district has a population of 5,082,868, roughly equal to the United Arab Emirates or the US state of Colorado.This gives it a ranking of 21st in India (out of a total of 640).The district has a population density of 1,281 inhabitants per square kilometre (3,320/sq mi).Its population growth rate over the decade 2001–2011 was 29.01%.Purbi Champaran has a sex ratio of 901 females for every 1000 males, and a literacy rate of 58.26%.

Languages include Bhojpuri, a tongue in the Bihari language group with almost 40 000 000 speakers, written in both the Devanagari and Kaithi scripts as well as urdu language also Urdu.