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, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Black or African American
Asian
Other race
Native American
Native Hawaiian or Pacific Islander
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% |
| Native American | 0 | 0% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
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