Oak is located in Mills County, Iowa. Oak has a 2025 population of 2,537 . Oak 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 Oak is $146,654 with a poverty rate of 1.98%. The median age in Oak is 40.9 years: 42.3 years for males, and 40.3 years for females. For every 100 females there are 94.3 males.
Data after 2023 is projected based on recent change
The racial composition of Oak includes 93.81% White, and smaller percentages for Asian, Black or African American, other race and multiracial populations.
White (93.81%)
Two or more races (4.65%)
Asian (0.59%)
Black or African American (0.55%)
Other race (0.39%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 2,380 | 93.81% |
| Two or more races | 118 | 4.65% |
| Asian | 15 | 0.59% |
| Black or African American | 14 | 0.55% |
| Other race | 10 | 0.39% |
Married
Widowed
Divorced
Separated
Never Married
Oak's average per capita income is $63,780. Household income levels show a median of $125,938. The poverty rate stands at 1.98%.
Name | Median | Mean |
|---|---|---|
| Married Families | $129,044 | - |
| Households | $125,938 | $146,654 |
| Families | $125,156 | $142,322 |
| Non Families | - | $168,195 |
Average Income
Median Household Income
Poverty Rate