'Union County, IA' definitions:
Union -- U.S. County in Iowa
From: Gazetteer 2000
Name :
Union -- U.S. County in Iowa
Population (2000) :
12309
Housing Units (2000) :
5657
Land area (2000) :
424.386689 sq. miles (1099.156431 sq. km)
Water area (2000) :
1.566735 sq. miles (4.057826 sq. km)
Total area (2000) :
425.953424 sq. miles (1103.214257 sq. km)
Located within :
Iowa (IA), FIPS 19
Location :
41.033565 N, 94.274698 W