
Thornbury township
- County:
- Chester County
- County Seat:
- No
- Area (mi²):
- 3.833
- State:
- Pennsylvania
Thornbury township is located in Chester County, Pennsylvania. Thornbury township has a 2025 population of 3,134. Thornbury township is currently declining at a rate of -0.44% annually and its population has decreased by -1.35% since the most recent census, which recorded a population of 3,177 in 2020.
The average household income in Thornbury township is $229,172 with a poverty rate of 4.84%. The median age in Thornbury township is 42.9 years: 43.2 years for males, and 40.8 years for females.