All Pennsylvania Counties

Central Pennsylvania

Blair County, Pennsylvania

County seat: Hollidaysburg

Blair County lies in the Allegheny Mountains of central Pennsylvania, home to Altoona and the great Pennsylvania Railroad works. The county seat is Hollidaysburg, while Altoona remains the largest city.

Cities, Towns & Communities

  • Altoona
  • Hollidaysburg
  • Tyrone
  • Bellwood
  • Martinsburg

1 full community guide available in this county.

Attractions

  • Horseshoe Curve
  • Allegheny Portage Railroad National Historic Site
  • Railroaders Memorial Museum

Parks & Recreation

  • Canoe Creek State Park
  • Blue Knob State Park
  • Valley View County Park

Transportation

I-99 and US 22 serve the county, and Amtrak's Pennsylvanian stops in Altoona and Tyrone.

Frequently Asked Questions

What is the county seat of Blair County?

Hollidaysburg is the seat of Blair County. Altoona is the county's largest city.

What is the Horseshoe Curve?

The Horseshoe Curve is a celebrated 1854 railroad engineering landmark west of Altoona, now a National Historic Landmark.

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