Blair County is located in the U.S. state of Pennsylvania. It is part of the Altoona, PA Metropolitan Statistical Area. The county seat is Hollidaysburg. The county was created on February 26, 1846, from parts of Huntingdon and Bedford Counties.

The Blair County government is composed of three elected commissioners who serve four-year terms. The commissioners are responsible for setting the county budget, levying taxes, and overseeing county departments. The county is also served by a sheriff, district attorney, coroner, prothonotary, register of wills, recorder of deeds, and clerk of courts.

Blair County has a diverse economy with strong healthcare, tourism, and manufacturing sectors. The county is also home to several colleges and universities, including Penn State Altoona and Juniata College.

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