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Blair County

Blair County, Pennsylvania
Blair County Courthouse Apr 10.JPG
Blair County Courthouse, Hollidaysburg
Map of Pennsylvania highlighting Blair County
Location in the U.S. state of Pennsylvania
Map of the United States highlighting Pennsylvania
Pennsylvania's location in the U.S.
Founded February 26, 1846
Seat Hollidaysburg
Largest city Altoona
Area
 • Total 527 sq mi (1,365 km2)
 • Land 526 sq mi (1,362 km2)
 • Water 1.3 sq mi (3 km2), 0.2%
Population (est.)
 • (2015) 125,593
 • Density 239/sq mi (92/km²)
Congressional district 9th
Time zone Eastern: UTC-5/-4
Website www.blairco.org
Footnotes:
Designated April 13, 1982

Blair County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 127,089. Its county seat is Hollidaysburg. The county was created on February 26, 1846, from parts of Huntingdon and Bedford Counties.

Blair County comprises the Altoona, PA Metropolitan Statistical Area.

According to the U.S. Census Bureau, the county has a total area of 527 square miles (1,360 km2), of which 526 square miles (1,360 km2) is land and 1.3 square miles (3.4 km2) (0.2%) is water.

As of the census of 2000, there were 127,089 people and 52,159 households within the county. The population density was 246 people per square mile (95/km²). There were 55,061 housing units at an average density of 105 per square mile (40/km²). The racial makeup of the county was 96.18% White, 1.68% Black or African American, 0.11% Native American, 0.56% Asian, 0.02% Pacific Islander, 0.23% from other races, and 1.22% from two or more races. 0.97% of the population were Hispanic or Latino of any race. 40.0% were of German, 12.2% Irish, 10.7% Italian, 9.9% American and 6.0% English ancestry according to Census 2000.


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