64.85% of the population of Rokan Hulu Regency in 2023 was aged 15-59 years.

The majority of the population in this region, or approximately 64.85%, are of productive age, namely 15-59 years old, totaling 371,940. According to a 2023 publication by the Central Statistics Agency (BPS), the number reached 371,940. The remaining population consists of those aged 0-14 years (children) at approximately 28.31%, and 6.83% are in the elderly group aged over 60 years.

The population of Rokan Hulu Regency was recorded at 573,520 people as of 2023. This figure increased compared to 2021 but is lower than in December 2019. Compared to the previous five years, the Compound Annual Growth Rate (CAGR) of this region is recorded as lower. The growth over the last five years was recorded at -2.21%.

Compared to other districts/cities in Riau province, the population of Rokan Hulu Regency ranks sixth. When grouped by island, this district/city ranks 28th.

The following is the population by age in Rokan Hulu Regency in December 2023, sourced from a publication by the Central Statistics Agency (BPS):

* Age 0-4 years: 39,970 people (6.97%)
* Age 5-9 years: 58,600 people (10.22%)
* Age 10-14 years: 63,820 people (11.13%)
* Age 15-19 years: 48,250 people (8.41%)

* Age 20-24 years: 52,400 people (9.14%)
* Age 25-29 years: 46,300 people (8.07%)
* Age 30-34 years: 43,470 people (7.58%)
* Age 35-39 years: 46,610 people (8.13%)
* Age 40-44 years: 46,310 people (8.07%)
* Age 45-49 years: 36,940 people (6.44%)
* Age 50-54 years: 29,560 people (5.15%)
* Age 55-59 years: 22,090 people (3.85%)
* Age 60-64 years: 15,960 people (2.78%)
* Age 65-69 years: 10,670 people (1.86%)
* Age 70-74 years: 6,070 people (1.06%)
* Age 75 years and over: 6,490 people (1.13%)