Altoona
- County:
- Blair County
- County Seat:
- No
- Area (mi²):
- 9.791
- State:
- Pennsylvania
Altoona is a city located in Blair County, Pennsylvania. Altoona has a 2026 population of 42,719. Altoona is currently declining at a rate of -0.31% annually and its population has decreased by -2.64% since the most recent census, which recorded a population of 43,877 in 2020.