Green Lake County, Wisconsin Demographics 2026

Population Overview

Green Lake County is located in Wisconsin with a total population of 19,263. It is the 55th most populous county out of 72 in Wisconsin. The county encompasses 6 Census-designated places.

Age Demographics

The median age in Green Lake County is 45.6 years. This is 13% higher than the state median of 40.2 years.

Economy, Income & Housing

The median household income in Green Lake County is $68,196. This is 12% lower than the state median of $77,485. It is also 16% lower than the national median of $80,734. The poverty rate stands at 13.8%. This is 31% higher than the state poverty rate of 10.5%. The unemployment rate is 2.8%. This is 15% lower than the state rate of 3.3%. The median home value is $215,400. Housing costs are 19% lower than the state median of $266,500. The home-value-to-income ratio is 3.2x. 74.5% of occupied housing units are owner-occupied. This homeownership rate is 10% higher than the state average of 67.8%.

Race & Ethnicity

Green Lake County has a predominantly White (non-Hispanic) population, comprising 90.5% of all residents. Hispanic or Latino residents account for 5.6%. The Black or African American population (0.5%) is well below the state average of 5.9%. The Asian population (1.1%) is well below the state average of 2.9%.

Education

22.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 32% lower than the state rate of 33.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.4%.

Data Sources & Methodology

All figures for Green Lake County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Wisconsin and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.