'West Valley' definitions:

West Valley, WA -- U.S. Census Designated Place in Washington

From: Gazetteer 2000
Name :
West Valley, WA -- U.S. Census Designated Place in Washington
Population (2000) :
10433
Housing Units (2000) :
3964
Land area (2000) :
7.203839 sq. miles (18.657857 sq. km)
Water area (2000) :
0.000000 sq. miles (0.000000 sq. km)
Total area (2000) :
7.203839 sq. miles (18.657857 sq. km)
FIPS code :
77885
Located within :
Washington (WA), FIPS 53
Location :
46.598731 N, 120.603011 W
Note :
some ZIP codes may be omitted esp. for suburbs.