Seneca -- U.S. County in New York Population (2000): 33342 Housing Units (2000): 14794 Land area (2000): 324.912952 sq. miles (841.520646 sq. km) Water area (2000): 65.600825 sq. miles (169.905350 sq. km) Total area (2000): 390.513777 sq. miles (1011.425996 sq. km) Located within: New York (NY), FIPS 36 Location: 42.801104 N, 76.827879 W Headwords: Seneca Seneca, NY Seneca County Seneca County, NY