Millville is located in Clayton County, Iowa. Millville has a 2025 population of 370 . Millville is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Millville is $62,524 with a poverty rate of 12.7%. The median age in Millville is 48.9 years: 56.6 years for males, and 41.5 years for females. For every 100 females there are 68.9 males.
Data after 2023 is projected based on recent change
The racial composition of Millville includes 82.43% White, and smaller percentages for and multiracial populations.
White (82.43%)
Two or more races (17.57%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 305 | 82.43% |
| Two or more races | 65 | 17.57% |
Married
Widowed
Divorced
Separated
Never Married
Millville's average per capita income is $32,969. Household income levels show a median of $48,333. The poverty rate stands at 12.7%.
Name | Median | Mean |
|---|---|---|
| Married Families | $63,125 | - |
| Families | $62,188 | $66,234 |
| Households | $48,333 | $62,524 |
| Non Families | $46,513 | $49,821 |
Average Income
Median Household Income
Poverty Rate