Hollidaysburg is a
borough and the
county seat of
Blair County in the
U.S. state of
Pennsylvania. It is located on the
Juniata River, south of
Altoona and is part of the
Altoona, Pennsylvania,
Metropolitan Statistical Area. In 1900, 2,998 people lived in the borough, in 1910, 3,734 lived there, and in 1940, 5,910 residents were counted. The population was 5,791 at the 2010 census. Coal, iron ore,
ganister, and limestone are found in the vicinity. In the past, the borough had foundries and machine shops, a silk mill, car works and
classification yards.