Green Lake -- U.S. County in Wisconsin Population (2000): 19105 Housing Units (2000): 9831 Land area (2000): 354.281654 sq. miles (917.585232 sq. km) Water area (2000): 26.154038 sq. miles (67.738644 sq. km) Total area (2000): 380.435692 sq. miles (985.323876 sq. km) Located within: Wisconsin (WI), FIPS 55 Location: 43.817523 N, 89.031104 W Headwords: Green Lake Green Lake, WI Green Lake County Green Lake County, WI