Columbia County's 2026 population is estimated at 58,441, reflecting a 0.28% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Columbia County is the 26th largest county in Wisconsin. The 2010 population was 56,854 and has grown 2.79% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.7 years
Female: 44.4 years
Male: 43.1 years
There are 46,300 adults, (11,422 of whom are seniors) in Columbia County.
Female: 28,454 (48.8%)
Male: 29,818 (51.2%)
The racial composition of Columbia County includes 91.04% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 53,053 | 91.04% |
| Two or more races | 2,525 | 4.33% |
| Black or African American | 1,062 | 1.82% |
| Other race | 853 | 1.46% |
| Asian | 466 | 0.8% |
| Native American | 313 | 0.54% |
Columbia County 's average per capita income is $54,669. Household income levels show a median of $85,351. The poverty rate stands at 7.75%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $117,151 | $132,683 |
| Families | $101,724 | $121,224 |
| Households | $85,351 | $102,726 |
| Non Families | $50,431 | $60,995 |
Average Income
Median Household Income
Poverty Rate
