
The U.S. Census Bureau released estimates of the July 1, 2025 population at the municipal level. This release includes total population estimates for all municipalities in Pennsylvania.
Key Findings from the Report:
- 988 municipalities increased from 2020 to 2025. Among those with populations over 2,500, Lancaster township in Butler County (+36.1%) had the largest percentage increase.
- 1,540 municipalities decreased from 2020 to 2025. Among those with populations over 2,500, California borough in Washington County (-14.0%) had the largest percentage decrease.
For more information on municipal population change in Pennsylvania, read this month’s brief.




