Jajpur district (listen^ⓘ) is a district of Odisha state in eastern India. The Odisha Government carried out a re-organisation of districts of Odisha in 1993. The erstwhile Cuttack district was split into multiple districts with Jajpur being one of them. The district came into being on 1 April 1993.

Jajpur is located in eastern Odisha. It borders Kendujhar and Bhadrak districts to the northeast, Kendrapara and Cuttack districts to the south and Dhenkanal district to the west. The district is located on the Odisha coastal plain, with the southern part lying in the Mahanadi River Delta. To the north there are some small discontinuous hill ranges. Some of the major rivers in the district are the Brahmani and Baitarani on the eastern edge.

According to the 2011 census, Jajpur district has a population of 1,827,192, roughly equal to the nation of Kosovo or the US state of Nebraska. This gives it a ranking of 261st in India (out of a total of 640). The district has a population density of 630 inhabitants per square kilometre (1,600/sq mi). Its population growth rate over the 2001–2011 decade was 12.43%. Jajpur has a sex ratio of 972 females for every 1000 males, and a literacy rate of 80.44%. 7.39% of the population lives in urban areas. Scheduled Castes and Scheduled Tribes made up 23.72% and 8.29% of the population respectively.

At the time of the 2011 Census of India, 90.27% of the population in the district spoke Odia, 4.79% Urdu and 2.09% Ho as their first language.

The district is divided into 10 revenue Tehsils as below.

The district consists of 1 subdivision Jajpur. It also consists of 10 blocks.

The district has 331 Gram Panchayats and 1781 villages.

The district has 2 municipalities Byasanagar and Jajpur, with the later serving as the district headquarters.