'Ontario, CA' definitions:

Ontario, CA -- U.S. city in California

From: Gazetteer 2000
Name :
Ontario, CA -- U.S. city in California
Population (2000) :
158007
Housing Units (2000) :
45182
Land area (2000) :
49.784002 sq. miles (128.939969 sq. km)
Water area (2000) :
0.073394 sq. miles (0.190090 sq. km)
Total area (2000) :
49.857396 sq. miles (129.130059 sq. km)
FIPS code :
53896
Located within :
California (CA), FIPS 06
Location :
34.052811 N, 117.627861 W
ZIP Codes (1990) :
91761 91762 91764
Note :
some ZIP codes may be omitted esp. for suburbs.