The majority of Tanah Laut Regency's population in 2023 is of working age.

In 2023, the majority of Tanah Laut Regency's population was in the productive age group (15-59 years old), totaling 239,340 or 65.73% of the total population. Children (0-14 years old) and the elderly (over 60 years old) constituted 25.55% and 8.72%, respectively.

The population of Tanah Laut Regency was recorded at 364,120 in 2023. This figure has increased consecutively for 21 years. Over the past five years, the Compound Annual Growth Rate (CAGR) of the population in this region was 1.72%. This growth is higher than the growth recorded in the previous five years, which was 1.29%.

Compared to other regions in South Kalimantan Province, this regency/city ranks among the top five in nominal terms; while in terms of island ranking, it is 16th.

The following is the population by age group in Tanah Laut Regency as of December 2023, sourced from the Central Bureau of Statistics (BPS) publication:

* Age 0-4 years: 27,410 (7.53%)
* Age 5-9 years: 32,020 (8.79%)
* Age 10-14 years: 33,590 (9.22%)
* Age 15-19 years: 27,590 (7.58%)

* Age 20-24 years: 31,160 (8.56%)
* Age 25-29 years: 26,780 (7.35%)
* Age 30-34 years: 28,400 (7.80%)
* Age 35-39 years: 28,510 (7.83%)
* Age 40-44 years: 30,100 (8.27%)
* Age 45-49 years: 26,540 (7.29%)
* Age 50-54 years: 22,720 (6.24%)
* Age 55-59 years: 17,540 (4.82%)
* Age 60-64 years: 12,760 (3.51%)
* Age 65-69 years: 8,400 (2.31%)
* Age 70-74 years: 5,040 (1.38%)
* Age 75 years and over: 5,570 (1.53%)