63.82% of Temanggung Regency's population in 2023 was aged 15-59 years.

Based on 2023 data from the Central Statistics Agency (BPS), 521,720 or approximately 63.82% of the population in Temanggung Regency are in the productive age group (15-59 years old). Meanwhile, 21.6% of the total population, or approximately 176,560, are children (aged 0-14 years), and another 14.58% are aged over 60 years.

The population of Temanggung Regency was recorded at 817,480 as of 2023. This figure is higher than in 2021 and December 2020. Compared to the previous five years, the Compound Annual Growth Rate (CAGR) of this region is higher. The growth over the last five years was recorded at 1.32%.

Compared to other regencies/cities in Central Java province, Temanggung Regency ranks 28th in terms of population. When grouped by island, this regency/city ranks 87th.

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

* Age 0-4 years: 51,760 (6.33%)
* Age 5-9 years: 58,620 (7.17%)
* Age 10-14 years: 66,170 (8.09%)
* Age 15-19 years: 58,840 (7.2%)

* Age 20-24 years: 61,890 (7.57%)
* Age 25-29 years: 59,350 (7.26%)
* Age 30-34 years: 57,340 (7.01%)
* Age 35-39 years: 55,880 (6.84%)
* Age 40-44 years: 58,790 (7.19%)
* Age 45-49 years: 57,770 (7.07%)
* Age 50-54 years: 58,020 (7.1%)
* Age 55-59 years: 53,830 (6.58%)
* Age 60-64 years: 43,770 (5.35%)
* Age 65-69 years: 33,670 (4.12%)
* Age 70-74 years: 20,610 (2.52%)
* Age 75 years and over: 21,160 (2.59%)