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