Between 2020 and 2025, Comal County saw a 27.8% population increase, according to county-level data released by the U.S. Census Bureau in March.
The overview
In 2020, Comal County had an estimated population of 163,608, which increased to an estimated population of 209,166 in 2025, data shows.
The largest contributor to population growth in the county is domestic migration, according to data from the bureau. Domestic migration refers to individuals moving across county or state lines. International migration refers to individuals who cross a national border between two countries, according to the bureau.
In both annual and cumulative measurements, the natural population growth in the county has increased, meaning more county residents were born than died. Between 2024 and 2025, the census data showed that there were 1,950 births and 1,650 deaths in the county.