'Columbia County, PA' definitions:

Columbia -- U.S. County in Pennsylvania

From: Gazetteer 2000
Name :
Columbia -- U.S. County in Pennsylvania
Population (2000) :
64151
Housing Units (2000) :
27733
Land area (2000) :
485.546308 sq. miles (1257.559112 sq. km)
Water area (2000) :
4.240671 sq. miles (10.983287 sq. km)
Total area (2000) :
489.786979 sq. miles (1268.542399 sq. km)
Located within :
Pennsylvania (PA), FIPS 42
Location :
41.041897 N, 76.394082 W