Jefferson Flag

Jefferson

County:
Greene County
County Seat:
Yes
Area (mi²):
6.016
State:
Iowa

Jefferson is a city located in Greene County, Iowa. Jefferson has a 2026 population of 4,133. It is also the county seat of Greene County. Jefferson is currently declining at a rate of -0.17% annually and its population has decreased by -1.08% since the most recent census, which recorded a population of 4,178 in 2020.

The median household income in Jefferson is $58,895 with a poverty rate of 7.34%. The median age in Jefferson is 53.6 years: 44.3 years for males, and 57.7 years for females. For every 100 females there are 90.8 males.

4.1K
Total Population
687
Density (mi²)
-7 -0.17%
Growth

Jefferson Population

Jefferson Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20264,133-7-0.17%
20254,140-8-0.19%
20244,148451.1%
20234,103-49-1.18%
20224,152-10-0.24%
20214,162-16-0.38%
20204,178-2-0.05%
20194,099-47-1.13%
20184,14620.05%
20174,144-23-0.55%
20164,167300.73%
20154,137-84-1.99%
20144,221-39-0.92%
20134,260-15-0.35%
20124,275-69-1.59%
20114,344-11-0.25%
20104,355100.23%
20004,6263347.78%
19904,292-562-11.58%
19804,8541192.51%
19704,7351653.61%
19604,5702445.64%
19504,3262385.82%
19404,08865719.15%
19303,431150.44%
19203,41681531.33%
19002,60100%

Median Age

Overall: 53.6 years
Female: 57.7 years
Male: 44.3 years

Jefferson Adults

There are 3,431 adults, (1,307 of whom are seniors) in Jefferson.

Sex Ratio

Female: 2,176 (52.4%)
Male: 1,976 (47.6%)

Demographics

The racial composition of Jefferson includes 94.73% White, and smaller percentages for other race, Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White3,93394.73%
Two or more races1904.58%
Other race190.46%
Black or African American100.24%
Race
Population ↓
Percentage (of total)
Two or more races882.12%
White400.96%
Other race190.46%
Race
Population ↓
Percentage (of total)
White3,89393.76%
Two or more races1022.46%
Black or African American100.24%

Jefferson Marital Status

Economics and Income Statistics

Jefferson 's average per capita income is $48,389. Household income levels show a median of $58,895. The poverty rate stands at 7.34%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$106,125-
Families$95,486$102,729
Households$58,895$79,035
Non Families$40,160$48,795

$48,389

Average Income

$58,895

Median Household Income

7.34%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)