South Kalimantan's population reached 4.23 million, with 16% residing in Banjarmasin City as of December 2023.

Based on population data from the Directorate General of Population and Civil Registration (Dukcapil) of the Ministry of Home Affairs, South Kalimantan Province had a population of 4.23 million as of December 2023.

Banjarmasin City has the largest population in South Kalimantan Province, with 678,240 inhabitants (16.02%) of the total population.

Next is Banjar Regency with 580,100 inhabitants (13.7%), Tanah Laut Regency with 364,120 inhabitants (8.6%), and Tanah Bumbu Regency with 346,340 inhabitants (8.18%).

Meanwhile, Balangan Regency has the smallest population, with only 136,520 inhabitants (3.22%).

Administratively, South Kalimantan Province is divided into 2 cities and 11 regencies, with 5 districts comprising 52 urban villages.

Based on marital status, 47.5% of the population of South Kalimantan Province is married, while 45.3% are unmarried. The population with divorced and widowed statuses reached 2.38% and 4.82%, respectively.

The following is a list of the 13 regencies/cities in South Kalimantan Province according to Dukcapil data as of December 2023:

1. Banjarmasin City: 678,240 inhabitants (16.02%)
2. Banjar Regency: 580,100 inhabitants (13.7%)
3. Tanah Laut Regency: 364,120 inhabitants (8.6%)
4. Tanah Bumbu Regency: 346,340 inhabitants (8.18%)
5. Kota Baru Regency: 329,640 inhabitants (7.79%)
6. Barito Kuala Regency: 324,500 inhabitants (7.66%)
7. Banjar Baru City: 272,760 inhabitants (6.44%)
8. Hulu Sungai Tengah Regency: 268,360 inhabitants (6.34%)
9. Tabalong Regency: 262,630 inhabitants (6.2%)
10. Hulu Sungai Selatan Regency: 237,320 inhabitants (5.6%)
11. Hulu Sungai Utara Regency: 235,780 inhabitants (5.57%)
12. Tapin Regency: 197,890 inhabitants (4.67%)
13. Balangan Regency: 136,520 inhabitants (3.22%)