Barito Kuala Regency is one of the regencies (kabupaten) in the Indonesian province of South Kalimantan. It is situated in the southwest of the province, bordering Central Kalimantan province to its immediate west and separated from Banjarmasin city to its east by the lower reaches of the Barito River. The regency's land area is 2,996.46 km, and the population was 276,147 at the 2010 Census and 313,021 at the 2020 Census; the official estimate (as at mid 2023) was 324,502 (comprising 164,348 males and 160,154 females). The capital is the town of Marabahan. The Motto of the Regency is "Selidah".

The Regency is divided into seventeen districts (Indonesian: kecamatan), tabulated below with their areas and population totals from the 2010 Census and 2120 Census, together with the official estimates for mid 2023. The twelve most southern of the districts lie within the official Banjarmasin metropolitan area; the other five districts (Barambai, Bakumpai, Marabahan, Tabukan and Kuripan) lie outside the metropolitan area. The table also includes the locations of the district administrative centres, the number of administrative villages in each district (a total of 195 rural desa and 6 urban kelurahan), and its postal codes.

Kode Wilayah	Name of District (kecamatan)	Area in km	Pop'n Census 2010	Pop'n Census 2020	Pop'n Estimate mid 2023	Admin centre	No. of villages	Post codes
63.04.01	Tabunganen	240.00	19,143	20,045	20,987	Tabunganen Kecil	14	70567
63.04.02	Tamban	164.30	31,115	31,967	32,925	Purwosari I	16	70566
63.04.13	Mekarsari	143.50	16,312	17,797	18,633	Tamban Raya	9	70568
63.04.03	Anjir Pasar	126.00	15,456	17,013	17,754	Anjir Pasar Kota I	15	70565
63.04.04	Anjir Muara	116.75	19,456	21,918	23,301	Anjir Muara Kota	15	70564
63.04.05	Alalak	107.35	51,403	62,833	63,000	Handil Bakti	18	70582
63.04.06	Mandastana	136.00	14,012	17,497	18,172	Puntik Luar	14	70580
63.04.17	Jejangkit	80.25	6,047	6,606	6,892	Jejangkit Pasar	7	70581
63.04.08	Belawang	37.50	12,717	13,627	14,406	Belawang	13	70563
63.04.16	Wanaraya	183.00	12,407	14,342	15,033	Kolam Kiri	13	70560
63.04.14	Barambai	261.81	13,971	15,672	16,405	Barambai	11	70562
63.04.07	Rantau Badauh	206.00	14,132	16,464	17,142	Sungai Gampa	9	70561
63.04.09	Cerbon	261.00	8,403	9,969	10,242	Bantuil	8	70571
63.04.10	Bakumpai	221.00	9,321	10,537	11,120	Lepasan	9	70512 & 70513
63.04.15	Marabahan	166.00	18,907	21,915	22,832	Marabahan Kota	10	70511 - 70513
63.04.12	Tabukan	343.50	8,097	9,030	9,529	Teluk Tamba	11	70553
63.04.11	Kuripan	203.00	5,316	5,789	6,129	Rimbun Tulang	9	70552
	Totals	2,996.46	276,147	313,021	324,502	Marabahan Kota	201

Note: (a) including 3 small offshore or riverine islands. (b) including 3 kelurahan - Berangas, Berangas Barat and Handil Bakti.
(c) including one kelurahan - Lepasan. (d) including 2 kelurahan - Marabahan Kota and Ulu Benteng.

Marabahan, the seat of the regency, has a tropical rainforest climate (Af) with heavy rainfall from October to May and moderate rainfall from June to September.

• Official website

3°05′00″S 114°37′00″E / 3.0833°S 114.6167°E / -3.0833; 114.6167