North Hulu Sungai Regency (Sungai means "River" and Hulu means "Upper" in Indonesian) is one of the regencies in the Indonesian province of South Kalimantan. It was created on 26 June 1959 from the trifurcation of the original Hulu Sungai Regency and formerly covered a much larger area in the north of the province, but on 14 July 1965 the northern districts were split off to create a separate Tabalong Regency, and on 25 February 2003 the eastern districts were split off to create a separate Balangan Regency. It now has a land area of 907.72 km², and had a population of 209,246 at the 2010 Census^[2] and 226,727 at the 2020 Census;^[3] the official estimate as of mid-2023 was 233,412 (comprising 116,900 males and 116,512 females).^[1] The capital of the regency is the town of Amuntai.

North Hulu Sungai Regency is divided into ten districts (kecamatan), listed below with their areas and their populations at the 2010 Census^[2] and 2020 Census,^[3] together with the official estimates as of mid-2023.^[1] The table includes the locations of the district administrative centres, the number of administrative villages in each district (a total of 214 rural desa and 5 urban kelurahan - the latter all in Amuntai Tengah District), and its postcode.

Note: (a) including the 5 kelurahan of Antasari, Kebun Sari, Murung Sari, Paliwara and Sungai Malang.

Amuntai has a tropical rainforest climate (Af) with moderate rainfall from July to September and heavy rainfall in the remaining months.