The majority of Banjarbaru City's population in 2023 is of working age.

In 2023, the majority of Banjar Baru city's population was in the productive age group (15-59 years old), totaling 181,010 or 66.36% of the total population. Children (0-14 years old) and the elderly (over 60 years old) comprised 25.95% and 7.68%, respectively.

The population of Banjar Baru city was recorded at 272,760 as of December 2023. This figure increased compared to June 2023 and is higher than in December 2021. Over the past five years, the Compound Annual Growth Rate (CAGR) of the population in this region was 1.31%. This growth is lower than the growth in the previous five years, which was recorded at 2.4%.

Compared to other areas in South Kalimantan province, Banjar Baru city ranks seventh in nominal terms, while in terms of island ranking, it is 26th.

The following is the population by age group in Banjar Baru city in December 2023, sourced from the Central Bureau of Statistics (BPS) publication:

* Age 0-4 years: 20,950 (7.68%)
* Age 5-9 years: 24,580 (9.01%)
* Age 10-14 years: 25,260 (9.26%)
* Age 15-19 years: 18,210 (6.68%)
* Age 20-24 years: 22,880 (8.39%)
* Age 25-29 years: 22,510 (8.25%)
* Age 30-34 years: 22,370 (8.2%)
* Age 35-39 years: 21,560 (7.9%)
* Age 40-44 years: 22,630 (8.3%)
* Age 45-49 years: 20,610 (7.56%)
* Age 50-54 years: 17,350 (6.36%)
* Age 55-59 years: 12,890 (4.73%)
* Age 60-64 years: 9,210 (3.38%)
* Age 65-69 years: 5,600 (2.05%)
* Age 70-74 years: 3,150 (1.16%)
* Age 75 years and over: 3,000 (1.1%)