Allen is located in Warren County, Iowa. Allen has a 2025 population of 4,739 . Allen 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 Allen is $109,228 with a poverty rate of 4.45%. The median age in Allen is 37.1 years: 36.9 years for males, and 37.4 years for females. For every 100 females there are 107.1 males.
Data after 2023 is projected based on recent change
The racial composition of Allen includes 93.8% White, and smaller percentages for Native American, other race, Black or African American, Asian and multiracial populations.
White (93.8%)
Two or more races (3.12%)
Native American (2.17%)
Other race (0.38%)
Black or African American (0.36%)
Asian (0.17%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 4,445 | 93.8% |
| Two or more races | 148 | 3.12% |
| Native American | 103 | 2.17% |
| Other race | 18 | 0.38% |
| Black or African American | 17 | 0.36% |
| Asian | 8 | 0.17% |
Married
Widowed
Divorced
Separated
Never Married
Allen's average per capita income is $59,538. Household income levels show a median of $100,492. The poverty rate stands at 4.45%.
Name | Median | Mean |
|---|---|---|
| Married Families | $127,861 | - |
| Families | $106,065 | $120,382 |
| Households | $100,492 | $109,228 |
| Non Families | $43,861 | $63,731 |
Average Income
Median Household Income
Poverty Rate