Hollidaysburg
- County:
- Blair County
- County Seat:
- Yes
- Area (mi²):
- 2.33
- State:
- Pennsylvania
Hollidaysburg is a borough located in Blair County, Pennsylvania. Hollidaysburg has a 2026 population of 5,537. It is also the county seat of Blair County. Hollidaysburg is currently growing at a rate of 0.54% annually but its population has decreased by -1.65% since the most recent census, which recorded a population of 5,630 in 2020.