'Mills County' definitions:

Mills -- U.S. County in Iowa

From: Gazetteer 2000
Name :
Mills -- U.S. County in Iowa
Population (2000) :
14547
Housing Units (2000) :
5671
Land area (2000) :
436.533506 sq. miles (1130.616543 sq. km)
Water area (2000) :
3.134918 sq. miles (8.119401 sq. km)
Total area (2000) :
439.668424 sq. miles (1138.735944 sq. km)
Located within :
Iowa (IA), FIPS 19
Location :
41.030434 N, 95.642009 W

Mills -- U.S. County in Texas

From: Gazetteer 2000
Name :
Mills -- U.S. County in Texas
Population (2000) :
5151
Housing Units (2000) :
2691
Land area (2000) :
748.109973 sq. miles (1937.595854 sq. km)
Water area (2000) :
1.777118 sq. miles (4.602714 sq. km)
Total area (2000) :
749.887091 sq. miles (1942.198568 sq. km)
Located within :
Texas (TX), FIPS 48
Location :
31.496048 N, 98.594231 W