Founded in 1846, Blair County is one of 67 counties in the state of Pennsylvania. Historically, Blair County was formed from parts of Huntingdon and Bedford Counties. The city of Hollidaysburg is the county seat. With FIPS code of 13, Blair County has a population of 121,767 and area of 527 square miles (1,365 km2).
List of all cities in Blair County, PA alphabetically
| City/Town | Postal Code | Area Code |
| Altoona, PA | 16601 | 814 |
| Altoona, PA | 16602 | 814 |
| Altoona, PA | 16603 | 814 |
| Antis, PA | 16617 | 814 |
| Bakers Summit, PA | 16673 | 814 |
| Bellwood, PA | 16617 | 814 |
| Birmingham, PA | 16686 | 814 |
| Claysburg, PA | 16625 | 814 |
| Curryville, PA | 16631 | 814 |
| Duncansville, PA | 16635 | 814 |
| East Freedom, PA | 16637 | 814 |
| Ganister, PA | 16693 | 814 |
| Hollidaysburg, PA | 16648 | 814 |
| Martinsburg, PA | 16662 | 814 |
| Newry, PA | 16665 | 814 |
| Roaring Springs, PA | 16673 | 814 |
| Sproul, PA | 16682 | 814 |
| Tipton, PA | 16684 | 814 |
| Tyrone, PA | 16686 | 814 |
| Williamsburg, PA | 16693 | 814 |