The majority of Kubu Raya Regency's population in 2024 will be of working age.

Kubu Raya Regency's population, by age group, shows 408,990 individuals (64.62%) in the productive age group, 166,810 individuals (26.35%) as children, and 57,149 individuals (9.03%) as the elderly population.

Kubu Raya Regency's population was recorded at 632,950 in 2024. This figure shows an increase. Compared to five years prior, the Compound Annual Growth Rate (CAGR) of this region is recorded as lower. The growth over the last five years is recorded at 0.84%.

Compared to other regencies/cities in West Kalimantan province, Kubu Raya Regency's population ranks among the top five. When grouped by island, this regency/city ranks seventh.

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

* Age 0-4 years: 46,150 individuals (7.29%)
* Age 5-9 years: 60,210 individuals (9.51%)
* Age 10-14 years: 60,450 individuals (9.55%)
* Age 15-19 years: 41,380 individuals (6.54%)
* Age 20-24 years: 56,740 individuals (8.96%)

* Age 25-29 years: 55,640 individuals (8.79%)
* Age 30-34 years: 51,210 individuals (8.09%)
* Age 35-39 years: 49,180 individuals (7.77%)
* Age 40-44 years: 48,330 individuals (7.63%)
* Age 45-49 years: 41,460 individuals (6.55%)
* Age 50-54 years: 35,560 individuals (5.62%)
* Age 55-59 years: 29,500 individuals (4.66%)
* Age 60-64 years: 22,150 individuals (3.5%)
* Age 65-69 years: 14,550 individuals (2.3%)
* Age 70-74 years: 9,760 individuals (1.54%)
* Age 75 years and older: 10,680 individuals (1.69%)