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.
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 (93.8%)
Two or more races (4.7%)
Asian (0.6%)
Black or African American (0.5%)
Other race (0.4%)
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