Baksa district is one of the 27 districts of Assam state under Bodoland Territorial Council in north-eastern India.

Baksa was notified as one of the districts of Bodoland Territorial Council in October 2003 while it started functioning from 1 June 2004 when Dr Anwaruddin Choudhury of the Assam Civil Service took charge as its founder Deputy Commissioner. It started working from PWD Inspection Bungalow of Barama on the NH 31 tll it was shifted to Mushalpur in late 2010.

According to the 2011 census Baksa district has a population of 953,773, roughly equal to the nation of Fiji or the US state of Montana. This gives it a ranking of 458th in India (out of a total of 640). The district has a population density of 475 inhabitants per square kilometre (1,230/sq mi). Its population growth rate over the decade 2001-2011 was 11.17%.Baksa has a sex ratio of 967 females for every 1000 males, and a literacy rate of 70.53%
It was created from parts of Barpeta, Nalbari, and Kamrup districts.

Mushalpur town is the headquarters of the district. This district is bounded by Bhutan in the north, Udalguri district in the east, Barpeta, Nalbari and Kamrup districts in the south and Chirang district in the west. Area of the district is 2400 km²

Baksa district is the home many tribal inhabitants like Bodo, Rabha, Sarania kachari and Madahi.