27.89% of Bau Bau City's population in 2023 was aged 0-14 years.

Bau Bau City's population, categorized by age group, shows 103,380 individuals (64.1%) in the productive age group, 44,985 (27.89%) children, and 12,920 (8.01%) elderly residents.

Bau Bau City's population was recorded at 160,230 as of June 2023. This figure is higher than in December 2021 but lower than in December 2020. Over the past five years, the Compound Annual Growth Rate (CAGR) of the population in this region decreased by 0.89%. This growth is lower than the previous five-year growth rate of 1.92%.

Compared to other regencies/cities in Southeast Sulawesi province, Bau Bau City ranks seventh in terms of population; nationally, it ranks 52nd.

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

* Age 0-4 years: 13,230 (8.26%)
* Age 5-9 years: 15,730 (9.82%)
* Age 10-14 years: 16,030 (10.0%)
* Age 15-19 years: 15,990 (9.98%)
* Age 20-24 years: 14,700 (9.17%)
* Age 25-29 years: 12,520 (7.81%)
* Age 30-34 years: 12,190 (7.61%)
* Age 35-39 years: 12,750 (7.96%)
* Age 40-44 years: 11,490 (7.17%)
* Age 45-49 years: 9,240 (5.77%)
* Age 50-54 years: 8,180 (5.11%)
* Age 55-59 years: 6,300 (3.93%)
* Age 60-64 years: 4,960 (3.1%)
* Age 65-69 years: 3,420 (2.13%)
* Age 70-74 years: 1,980 (1.23%)
* Age 75 years and over: 2,560 (1.6%)