Ontario, CA (city, FIPS 53896)
Location: (34.052811, -117.627861)
Population (2000): 158,007 (45,182 housing units)
Area: 49.784002 sq mi (land), 0.073394 sq mi (water)
Zip code(s): 91761, 91762, 91764

Ontario, CA (CCD, FIPS 07192260)
Location: (34.070960, -117.642736)
Population (2000): 539,321 (165,474 housing units)
Area: 182.512977 sq mi (land), 0.399398 sq mi (water)
Zip code(s): 91761, 91762, 91764

Ontario, OR (CCD, FIPS 04592397)
Location: (44.030154, -116.986500)
Population (2000): 14,004 (5,543 housing units)
Area: 40.088604 sq mi (land), 0.568415 sq mi (water)
Zip code(s): 97914

Ontario, NY (town, FIPS 11755013)
Location: (43.242161, -77.298023)
Population (2000): 9,778 (3,814 housing units)
Area: 32.217354 sq mi (land), 0.118339 sq mi (water)
Zip code(s): 14519

Ontario, WI (village, FIPS 12360075)
Location: (43.723396, -90.591999)
Population (2000): 476 (254 housing units)
Area: 1.012503 sq mi (land), 0.000000 sq mi (water)
Zip code(s): 54651

Ontario, NY (County, FIPS 069)
Location: (42.875038, -77.262252)
Population (2000): 100,224 (42,647 housing units)
Area: 644.382125 sq mi (land), 18.046632 sq mi (water)
Zip code(s): 14519

Ontario, WI (village, FIPS 60075)
Location: (43.723396, -90.591999)
Population (2000): 476 (254 housing units)
Area: 1.012503 sq mi (land), 0.000000 sq mi (water)
Zip code(s): 54651

Ontario, OR (city, FIPS 54900)
Location: (44.026837, -116.968672)
Population (2000): 10,985 (4,436 housing units)
Area: 4.466727 sq mi (land), 0.000000 sq mi (water)
Zip code(s): 97914

Ontario, ND (township, FIPS 07159460)
Location: (48.131925, -98.576493)
Population (2000): 80 (32 housing units)
Area: 33.965507 sq mi (land), 1.989731 sq mi (water)

Ontario, OH (village, FIPS 58520)
Location: (40.768906, -82.603066)
Population (2000): 5,303 (2,319 housing units)
Area: 10.918349 sq mi (land), 0.000000 sq mi (water)

Ontario, SD (township, FIPS 05947220)
Location: (44.748771, -99.255174)
Population (2000): 37 (17 housing units)
Area: 35.770047 sq mi (land), 0.019172 sq mi (water)

Ontario, IL (township, FIPS 09556172)
Location: (41.085925, -90.239750)
Population (2000): 1,047 (414 housing units)
Area: 36.239701 sq mi (land), 0.000000 sq mi (water)

West Ontario, ND (township, FIPS 10385120)
Location: (47.551923, -99.719456)
Population (2000): 49 (24 housing units)
Area: 35.378237 sq mi (land), 0.343183 sq mi (water)