Green Lake County's 2026 population is estimated at 19,276, reflecting a -0.24% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Green Lake County is the 55th largest county in Wisconsin. The 2010 population was 19,016 and has grown 1.37% since 2010.
Data after 2023 is projected based on recent change
Overall: 45.6 years
Female: 46.5 years
Male: 44.8 years
There are 15,088 adults, (4,527 of whom are seniors) in Green Lake County.
Female: 9,632 (50%)
Male: 9,631 (50%)
The racial composition of Green Lake County includes 91.58% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 17,641 | 91.58% |
| Two or more races | 748 | 3.88% |
| Other race | 427 | 2.22% |
| Asian | 219 | 1.14% |
| Black or African American | 135 | 0.7% |
| Native American | 79 | 0.41% |
| Native Hawaiian or Pacific Islander | 14 | 0.07% |
Green Lake County 's average per capita income is $48,526. Household income levels show a median of $68,196. The poverty rate stands at 13.77%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $98,909 | - |
| Families | $87,421 | $107,561 |
| Households | $68,196 | $91,125 |
| Non Families | $43,546 | $59,225 |
Average Income
Median Household Income
Poverty Rate