Jefferson Flag

Jefferson

County Seat:
No
Area (mi²):
18.163
State:
Illinois

Jefferson is located in Stephenson County, Illinois. Jefferson has a 2025 population of 240 . Jefferson is currently declining at a rate of -0.41% annually and its population has decreased by -3.23% since the most recent census, which recorded a population of 248 in 2020.

The average household income in Jefferson is $81,292 with a poverty rate of 4.86%. The median age in Jefferson is 48.1 years: 43.8 years for males, and 52 years for females. For every 100 females there are 120.2 males.

240
Total Population
13
Density (mi²)
-1 -0.41%
Growth

Jefferson Population

Jefferson Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Jefferson includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

White (100%)

Race
Population
Percentage (of total)
White185100%

Jefferson Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Jefferson's average per capita income is $28,750. Household income levels show a median of $75,556. The poverty rate stands at 4.86%.

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$76,250-
Households$75,556$81,292
Families$75,556$79,555
Non Families--

$28,750

Average Income

$75,556

Median Household Income

4.86%

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)