Jefferson is located in Greene County, Iowa. Jefferson has a 2025 population of 4,373. It is also the county seat of Greene County. Jefferson 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 Jefferson is $166,733 with a poverty rate of 4.11%.The median age in Jefferson is 46.6 years: 46.9 years for males, and 46.3 years for females.
Data after 2023 is projected based on recent change
The racial composition of Jefferson includes 92.09% White, and smaller percentages for Asian, Black or African American, Native American, other race and multiracial populations.
White (92.1%)
Two or more races (3.9%)
Asian (2.6%)
Black or African American (0.9%)
Native American (0.3%)
Other race (0.2%)
Race | Population | Percentage (of total) |
---|---|---|
White | 4,027 | 92.09% |
Two or more races | 170 | 3.89% |
Asian | 114 | 2.61% |
Black or African American | 41 | 0.94% |
Native American | 11 | 0.25% |
Other race | 10 | 0.23% |
Married
Widowed
Divorced
Separated
Never Married
Jefferson's average per capita income is $67,824. Household income levels show a median of $124,665. The poverty rate stands at 4.11%.
Name | Median | Mean |
---|---|---|
Married Families | $155,898 | - |
Families | $148,533 | $191,184 |
Households | $124,665 | $166,733 |
Non Families | $61,875 | $74,330 |
Average Income
Median Household Income
Poverty Rate