|• Total||2,510 km2 (970 sq mi)|
|• Density||290/km2 (760/sq mi)|
|Time zone||UTC+05:30 (IST)|
|ISO 3166 code||IN-AS|
Bongaigaon district (Prpn:ˈbɒŋgaɪˌgãʊ) is an administrative district in the state of Assam in northeastern India. The district headquarters are located at Bongiagaon. The district occupies an area of 2,510 km².
Bongaigaon district occupies an area of 1,724 square kilometres (666 sq mi), comparatively equivalent to Réunion. Bongaigaon district is surrounded by Barpeta in the east, the Brahmaputra in the south and Kokrajhar in the north and west corner and share international border with Bhutan in the north.The places that are worth visiting in bongaigaon are eco park, bagheswari temple, tea garden, suryapahar etc. The history of bagheswari temple is such that once a priest saw in his dream that maa bagheswari asked him to go to particular place where if he digs out he will find a sword that belonged to maa bagheswari. And next morning when the priest actually went to dig in the place he saw in his dreams , he actually found the sword. After that day a temple was built over the place and there they worship the sword. There is no idol actually inside the temple
In 2006 the Indian government named Bongaigaon one of the country's 250 most backward districts (out of a total of 640). It is one of the eleven districts in Assam currently receiving funds from the Backward Regions Grant Fund Programme (BRGF).
The district has three subdivisions: Bongaigaon, Bijni and North Salmara. In 2004, parts of the Bongaigaon district (mainly areas under Bijni subdivision) were given over to form the Chirang district, under the Bodoland Territorial Council (BTC), with its district headquarters at Kajalgaon.
There are four Assam Legislative Assembly constituencies in this district: Bongaigaon, Bijni, Abhayapuri North, and Abhayapuri South. The latter is designated for scheduled castes. Bijni is in the Kokrajhar Lok Sabha constituency, whilst the other three are in the Barpeta Lok Sabha constituency.
According to the 2011 census Bongaigaon district has a population of 732,639, roughly equal to the nation of Guyana or the US state of Alaska. This gives it a ranking of 496th in India (out of a total of 640). The district has a population density of 425 inhabitants per square kilometre (1,100/sq mi) . Its population growth rate over the decade 2001–2011 was 19.58%. Bongaigaon has a sex ratio of 961 females for every 1000 males, and a literacy rate of 70.44%.
Muslims are a majority of the district with 50.22% (371,033), while 359,145 people are Hindus (48.6%). 
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