In 2019, Green Lake County, WI had a population of 18.8k people with a median age of 45.3 and a median household income of $55,075. Between 2018 and 2019 the population of Green Lake County, WI declined from 18,757 to 18,755, a −0.0107% decrease and its median household income grew from $53,260 to $55,075, a 3.41% increase.
The 5 largest ethnic groups in Green Lake County, WI are White (Non-Hispanic) (92.3%), White (Hispanic) (4.07%), Two+ (Non-Hispanic) (1.12%), Asian (Non-Hispanic) (0.73%), and Other (Hispanic) (0.704%). 0% of the households in Green Lake County, WI speak a non-English language at home as their primary language.
98.3% of the residents in Green Lake County, WI are U.S. citizens.
In 2019, the median property value in Green Lake County, WI was $146,600, and the homeownership rate was 76.1%. Most people in Green Lake County, WI drove alone to work, and the average commute time was 24.3 minutes. The average car ownership in Green Lake County, WI was 2 cars per household.