Petersburg
- County:
- Huntingdon County
- County Seat:
- No
- Area (mi²):
- 0.333
- State:
- Pennsylvania
Petersburg is a borough located in Huntingdon County, Pennsylvania. Petersburg has a 2026 population of 416. Petersburg is currently growing at a rate of 0.48% annually but its population has decreased by -0.24% since the most recent census, which recorded a population of 417 in 2020.
The median household income in Petersburg is $66,250 with a poverty rate of 4.71%. The median age in Petersburg is 40.1 years: 35.5 years for males, and 41.4 years for females. For every 100 females there are 82.8 males.