Merangin is a regency (kabupaten) of Jambi Province on the island of Sumatra, Indonesia. It was created on 4 October 1999 by the division of the former Sarolangun Bangko Regency into a new Sarolangun Regency and this Merangin Regency. The regency covers an area of 7,668.61 km², and had a population of 333,206 at the 2010 census^[2] and 354,052 at the 2020 census;^[3] the official estimate as at mid 2022 was 357,577, comprising 181,850 males and 175,727 females.^[1] The administrative capital is the town of Bangko.

Merangin Regency is divided into twenty-four districts (kecamatan), tabulated below with their areas and their populations at the 2010 census^[2] and the 2020 census,^[3] together with the official estimates as at mid 2022.^[1] The table also includes the locations of the district administrative centres, the number of administrative villages in each district (totaling 205 rural desa and 10 urban kelurahan), and its post code.

Notes: (a) including one kelurahan - the town of Pamenang. (b) comprising 4 kelurahan and 4 desa. (c) comprising 5 kelurahan and 6 desa.

However, the last-mentioned eight districts, comprising the northern 26% of Merangin Regency, are in the process of being separated out to form a new Regency - Kabupaten Tabir Raya; these eight districts cover 2,000.07 km² and had an estimated combined population of 113,841 at the 2020 census,^[3] rising to an estimated 114,527 in mid 2022.^[1]

Merangin Geopark has been proposed to UNESCO to be a World's Heritage Merangin Geopark and a UNESCO team has visited Merangin Geopark. The Geopark has a Araucarioxylon fossil tree complete with the root of 300 million years, the oldest in Asia. Today the ancient Merangin River is usually used for white water sports.^[4]