Green Lake County, Wisconsin

Green Lake County, Wisconsin
Location within the U.S. state of Wisconsin
Coordinates: 43°49′N 89°02′W / 43.81°N 89.04°W / 43.81; -89.04
Country United States
State Wisconsin
Founded1858
Named afterGreen Lake
SeatGreen Lake
Largest cityBerlin
Area
 • Total
380 sq mi (980 km2)
 • Land349 sq mi (900 km2)
 • Water31 sq mi (80 km2)  8.1%
Population
 (2020)
 • Total
19,018
 • Estimate 
(2024)
19,370
 • Density55.5/sq mi (21.4/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district6th
Websitewww.co.green-lake.wi.us

Green Lake County is a county located in the U.S. state of Wisconsin. As of the 2020 census, the population was 19,018. Its county seat is Green Lake. In 2020, the center of population of Wisconsin was located in Green Lake County, near the city of Markesan.