Alton is a city located in Sioux County, Iowa. Alton has a 2025 population of 1,242. Alton is currently declining at a rate of 0% annually and its population has decreased by -0.16% since the most recent census, which recorded a population of 1,244 in 2020.
The average household income in Alton is $108,623 with a poverty rate of 2.96%.The median age in Alton is 32.7 years: 32.1 years for males, and 34.6 years for females.
Data after 2023 is projected based on recent change
The racial composition of Alton includes 92.15% White, and smaller percentages for Black or African American, Asian, other race and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,244 | 92.15% |
| Two or more races | 52 | 3.85% |
| Black or African American | 36 | 2.67% |
| Asian | 12 | 0.89% |
| Other race | 6 | 0.44% |
Married
Widowed
Divorced
Separated
Never Married
Alton's average per capita income is $48,365. Household income levels show a median of $86,136. The poverty rate stands at 2.96%.
Name | Median | Mean |
|---|---|---|
| Married Families | $114,926 | - |
| Families | $112,721 | $131,344 |
| Households | $86,136 | $108,623 |
| Non Families | $48,854 | $55,510 |
Average Income
Median Household Income
Poverty Rate