Jefferson County's estimated 2025 population is 14,984 with a growth rate of -1.5% in the past year according to the most recent United States census data. Jefferson County is the 49th largest county in Iowa. The 2010 population was 16,835 and has seen a growth of -10.99% since that time.
Data after 2023 is projected based on recent change
The racial composition of Jefferson County includes 84.65% White, 5.95% Black or African American, 4.61% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Black or African American
Asian
Two or more races
Other race
Native American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 13,269 | 84.65% |
| Black or African American | 932 | 5.95% |
| Asian | 723 | 4.61% |
| Two or more races | 485 | 3.09% |
| Other race | 135 | 0.86% |
| Native American | 132 | 0.84% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Jefferson County's average per capita income is $35,877. Household income levels show a median of $56,824. The poverty rate stands at 14.55%.
Name | Median | Mean |
|---|---|---|
| Married Families | $91,578 | - |
| Families | $78,622 | $100,743 |
| Households | $56,824 | $78,591 |
| Non Families | $32,917 | $50,190 |
Average Income
Median Household Income
Poverty Rate
