'Ontario County' definitions:
Ontario -- U.S. County in New York
From: Gazetteer 2000
Name :
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