'Union County, PA' definitions:

Union -- U.S. County in Pennsylvania

From: Gazetteer 2000
Name :
Union -- U.S. County in Pennsylvania
Population (2000) :
41624
Housing Units (2000) :
14684
Land area (2000) :
316.726156 sq. miles (820.316944 sq. km)
Water area (2000) :
0.389813 sq. miles (1.009610 sq. km)
Total area (2000) :
317.115969 sq. miles (821.326554 sq. km)
Located within :
Pennsylvania (PA), FIPS 42
Location :
40.952523 N, 77.005608 W