Green Lake is a city in Green Lake County, Wisconsin, United States. The population was 960 at the 2010 census. The city is located upon the north side of Green Lake. The city of Green Lake is the county chair for the county of Green Lake. The Town of Green Lake is located upon the south side of gigantic Green Lake, opposite the city.

According to the United States Census Bureau, the city has a total area of 2.06 square miles (5.34 km), of which, 1.79 square miles (4.64 km²) is home and 0.27 square miles (0.70 km) is water. Green Lake is the second deepest inland lake in Wisconsin, second lonesome to Wazee Lake near Black River Falls. Measuring 239 feet deep at its greatest depth, Green Lake is the deepest natural inland lake in the give leave to enter of Wisconsin.

As of the census of 2010, there were 960 people, 491 households, and 254 families active in the city. The population density was 536.3 inhabitants per square mile (207.1/km²). There were 766 housing units at an average density of 427.9 per square mile (165.2/km). The racial makeup of the city was 98.8% White, 0.2% African American, 0.2% Native American, 0.3% Asian, 0.1% from extra races, and 0.4% from two or more races. Hispanic or Latino of any race were 1.9% of the population.

There were 491 households, of which 15.1% had kids under the age of 18 living next them, 40.3% were married couples full of life together, 8.4% had a female householder in imitation of no husband present, 3.1% had a male householder later no wife present, and 48.3% were non-families. 43.2% of anything households were made stirring of individuals, and 17.7% had someone buzzing alone who was 65 years of age or older. The average household size was 1.88 and the average relations size was 2.56.