Trempealeau County's 2026 population is estimated at 30,525, reflecting a -0.45% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Trempealeau County is the 43rd largest county in Wisconsin. The 2010 population was 28,846 and has grown 5.82% since 2010.
Data after 2023 is projected based on recent change
Overall: 39.9 years
Female: 39.8 years
Male: 40 years
There are 22,618 adults, (5,758 of whom are seniors) in Trempealeau County.
Female: 15,113 (49%)
Male: 15,726 (51%)
The racial composition of Trempealeau County includes 84.92% White, 8.46% other race, and smaller percentages for Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 26,190 | 84.92% |
| Other race | 2,609 | 8.46% |
| Two or more races | 1,372 | 4.45% |
| Native American | 346 | 1.12% |
| Asian | 142 | 0.46% |
| Black or African American | 107 | 0.35% |
| Native Hawaiian or Pacific Islander | 73 | 0.24% |
Trempealeau County 's average per capita income is $50,338. Household income levels show a median of $76,313. The poverty rate stands at 9.92%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $106,909 | $122,851 |
| Families | $95,531 | $110,261 |
| Households | $76,313 | $92,199 |
| Non Families | $47,271 | $55,144 |
Average Income
Median Household Income
Poverty Rate
