The majority of Barito Kuala Regency's population in 2024 will be of working age.

Based on 2024 data from the Central Bureau of Statistics (BPS), 219,590 or approximately 67.21% of the population in Barito Kuala Regency are in the productive age group (15-59 years). Children (aged 0-14 years) account for 22.66% of the total population, or approximately 74,029, while 10.14% are aged over 60 years.

The population of Barito Kuala Regency was recorded at 326,740 in 2024. This figure is higher than in 2023 and December 2021. Over the past five years, the Compound Annual Growth Rate (CAGR) of the population in this region was 1.06%, lower than the 1.09% recorded in the previous five years.

Compared to other regencies/cities in South Kalimantan province, Barito Kuala Regency ranks sixth in population. Nationally (island-wide), it ranks 19th.

The following is the population by age group in Barito Kuala Regency as of June 2024, sourced from the Central Bureau of Statistics (BPS) publication:

* Age 0-4 years: 18,840 (5.77%)
* Age 5-9 years: 26,530 (8.12%)
* Age 10-14 years: 28,660 (8.77%)
* Age 15-19 years: 25,350 (7.76%)
* Age 20-24 years: 28,040 (8.58%)
* Age 25-29 years: 22,890 (7.01%)
* Age 30-34 years: 25,200 (7.71%)
* Age 35-39 years: 25,300 (7.74%)
* Age 40-44 years: 26,620 (8.15%)
* Age 45-49 years: 25,530 (7.81%)
* Age 50-54 years: 22,370 (6.85%)
* Age 55-59 years: 18,280 (5.59%)
* Age 60-64 years: 13,080 (4%)
* Age 65-69 years: 8,700 (2.66%)
* Age 70-74 years: 5,270 (1.61%)
* Age 75 years and over: 6,070 (1.86%)