In 2018, Green Lake County, WI had a population of 18.8k people with a median age of 45.4 and a median household income of $53,260. Between 2017 and 2018 the population of Green Lake County, WI grew from 18,745 to 18,757, a 0.064% increase and its median household income grew from $50,276 to $53,260, a 5.94% increase.
The 5 largest ethnic groups in Green Lake County, WI are White (Non-Hispanic) (92.6%), White (Hispanic) (3.77%), Two+ (Non-Hispanic) (1.08%), Black or African American (Non-Hispanic) (0.944%), and Other (Hispanic) (0.784%). 0% of the households in Green Lake County, WI speak a non-English language at home as their primary language, and 98% of the residents in Green Lake County, WI are U.S. citizens.
In 2018, the median property value in Green Lake County, WI was $142,600, and the homeownership rate was 75%. Most people in Green Lake County, WI drove alone to work, and the average commute time was 23.4 minutes. The average car ownership in Green Lake County, WI was 2 cars per household.