Dimapur is a district of Nagaland state in India. Its headquarters is Chumukedima. As of 2011 it is the most populous district of Nagaland (out of 11).

According to the 2011 census Dimapur district has a population of 379,769, roughly equal to the nation of Maldives.This gives it a ranking of 563rd in India (out of a total of 640).Its population growth rate over the decade 2001-2011 was 0%.Dimapur has a sex ratio of 916 females for every 1000 males, and a literacy rate of 85.44%.

In 1986 Dimapur district became home to the Rangapahar Wildlife Sanctuary, which has an area of 4.7 km2 (1.8 sq mi).