Monona County's 2026 population is estimated at 8,281, reflecting a -0.89% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Monona County is the 85th largest county in Iowa. The 2010 population was 9,249 and has grown -10.47% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.7 years
Female: 45.6 years
Male: 42.6 years
There are 6,622 adults, (2,084 of whom are seniors) in Monona County.
Female: 4,364 (51%)
Male: 4,193 (49%)
The racial composition of Monona County includes 93.42% White, and smaller percentages for Native American, Black or African American, other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 7,994 | 93.42% |
| Two or more races | 497 | 5.81% |
| Native American | 40 | 0.47% |
| Black or African American | 21 | 0.25% |
| Other race | 5 | 0.06% |
Monona County 's average per capita income is $46,096. Household income levels show a median of $68,377. The poverty rate stands at 10.64%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $92,240 | - |
| Families | $84,667 | $97,962 |
| Households | $68,377 | $81,023 |
| Non Families | $36,085 | $48,819 |
Average Income
Median Household Income
Poverty Rate
