Mill Plain is a CDP located in . Mill Plain has a 2025 population of 2,301. Mill Plain is currently growing at a rate of 7.12% annually and its population has increased by 37.13% since the most recent census, which recorded a population of 1,678 in 2020.
The average household income in Mill Plain is $224,158 with a poverty rate of 3.79%.The median age in Mill Plain is 44.3 years: 40.7 years for males, and 45.3 years for females.
Data after 2023 is projected based on recent change
The racial composition of Mill Plain includes 94.44% White, and smaller percentages for Asian, other race and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,870 | 94.44% |
| Two or more races | 90 | 4.55% |
| Asian | 13 | 0.66% |
| Other race | 7 | 0.35% |
Married
Widowed
Divorced
Separated
Never Married
Mill Plain's average per capita income is $99,074. Household income levels show a median of $190,250. The poverty rate stands at 3.79%.
Name | Median | Mean |
|---|---|---|
| Married Families | $210,469 | - |
| Families | $205,214 | $241,658 |
| Households | $190,250 | $224,158 |
| Non Families | $51,875 | $58,284 |
Average Income
Median Household Income
Poverty Rate