Marklesburg
- County:
- Bedford County
- County Seat:
- No
- Area (mi²):
- 1.036
- State:
- Pennsylvania
Marklesburg is a borough located in Bedford County, Pennsylvania. Marklesburg has a 2026 population of 181. Marklesburg is currently declining at a rate of -0.55% annually and its population has decreased by -2.69% since the most recent census, which recorded a population of 186 in 2020.