WordNet (r) 3.0 (2006):

Ontario
    n 1: the smallest of the Great Lakes [syn: Lake Ontario,
         Ontario]
    2: a prosperous and industrialized province in central Canada

U.S. Gazetteer Counties (2000):

Ontario -- U.S. County in New York
   Population (2000):    100224
   Housing Units (2000): 42647
   Land area (2000):     644.382125 sq. miles (1668.941972 sq. km)
   Water area (2000):    18.046632 sq. miles (46.740560 sq. km)
   Total area (2000):    662.428757 sq. miles (1715.682532 sq. km)
   Located within:       New York (NY), FIPS 36
   Location:             42.875038 N, 77.262252 W
   Headwords:
    Ontario
    Ontario, NY
    Ontario County
    Ontario County, NY


U.S. Gazetteer Places (2000):

Ontario, WI -- U.S. village in Wisconsin
   Population (2000):    476
   Housing Units (2000): 254
   Land area (2000):     1.012503 sq. miles (2.622370 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.012503 sq. miles (2.622370 sq. km)
   FIPS code:            60075
   Located within:       Wisconsin (WI), FIPS 55
   Location:             43.723396 N, 90.591999 W
   ZIP Codes (1990):     54651
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Ontario, WI
    Ontario


U.S. Gazetteer Places (2000):

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.
   Headwords:
    Ontario, CA
    Ontario


U.S. Gazetteer Places (2000):

Ontario, OH -- U.S. village in Ohio
   Population (2000):    5303
   Housing Units (2000): 2319
   Land area (2000):     10.918349 sq. miles (28.278393 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    10.918349 sq. miles (28.278393 sq. km)
   FIPS code:            58520
   Located within:       Ohio (OH), FIPS 39
   Location:             40.768906 N, 82.603066 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Ontario, OH
    Ontario


U.S. Gazetteer Places (2000):

Ontario, OR -- U.S. city in Oregon
   Population (2000):    10985
   Housing Units (2000): 4436
   Land area (2000):     4.466727 sq. miles (11.568769 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    4.466727 sq. miles (11.568769 sq. km)
   FIPS code:            54900
   Located within:       Oregon (OR), FIPS 41
   Location:             44.026837 N, 116.968672 W
   ZIP Codes (1990):     97914
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Ontario, OR
    Ontario