
St Petersburg
- County:
- Clarion County
- County Seat:
- No
- Area (mi²):
- 0.319
- State:
- Pennsylvania
St. Petersburg is a borough located in Clarion County, Pennsylvania. St. Petersburg has a 2025 population of 327. St. Petersburg is currently declining at a rate of -0.61% annually and its population has decreased by -3.54% since the most recent census, which recorded a population of 339 in 2020.
The average household income in St. Petersburg is $68,954 with a poverty rate of 8.2%. The median age in St. Petersburg is 54.2 years: 52 years for males, and 54.8 years for females.