'Ada County, ID' definitions:

Ada -- U.S. County in Idaho

From: Gazetteer 2000
Name :
Ada -- U.S. County in Idaho
Population (2000) :
300904
Housing Units (2000) :
118516
Land area (2000) :
1054.990995 sq. miles (2732.414018 sq. km)
Water area (2000) :
5.336939 sq. miles (13.822607 sq. km)
Total area (2000) :
1060.327934 sq. miles (2746.236625 sq. km)
Located within :
Idaho (ID), FIPS 16
Location :
43.560300 N, 116.280069 W