26.46% of Pasaman Regency's population in 2023 was aged 0-14 years.

Pasaman Regency's population, categorized by age group, shows that 194,130 individuals (62.78%) are of productive age, 81,816 (26.46%) are children, and the remaining 33,259 (10.76%) are senior citizens.

The population of Pasaman Regency was recorded at 306,620 as of June 2023. This figure is higher than that recorded in December 2021 and December 2019. Over the past five years, the Compound Annual Growth Rate (CAGR) of the population in this region was 2.15%. This growth is higher than the growth recorded in the previous five years, which was 0.91%.

Compared to other regencies/cities in West Sumatra Province, Pasaman Regency ranks ninth in population. When grouped by island, it ranks 75th.

The following is the population of Pasaman Regency by age group as of June 2023, sourced from the Central Bureau of Statistics (BPS) publication:

* Age 0-4 years: 22,840 (7.45%)
* Age 5-9 years: 28,280 (9.22%)
* Age 10-14 years: 30,700 (10.01%)
* Age 15-19 years: 27,250 (8.89%)
* Age 20-24 years: 29,140 (9.51%)
* Age 25-29 years: 24,550 (8.01%)
* Age 30-34 years: 20,830 (6.79%)
* Age 35-39 years: 22,570 (7.36%)
* Age 40-44 years: 21,920 (7.15%)
* Age 45-49 years: 18,490 (6.03%)
* Age 50-54 years: 15,700 (5.12%)
* Age 55-59 years: 13,660 (4.45%)
* Age 60-64 years: 12,010 (3.92%)
* Age 65-69 years: 9,320 (3.04%)
* Age 70-74 years: 5,600 (1.83%)
* Age 75 years and older: 6,330 (2.06%)