Oil City
- County:
- Venango County
- County Seat:
- No
- Area (mi²):
- 4.493
- State:
- Pennsylvania
Oil City is a city located in Venango County, Pennsylvania. Oil City has a 2026 population of 9,368. Oil City is currently declining at a rate of -0.07% annually and its population has decreased by -2.29% since the most recent census, which recorded a population of 9,588 in 2020.