Jefferson Flag

Jefferson

County:
Union County
County Seat:
No
Area (mi²):
35.446
State:
South Dakota

Jefferson is located in Union County, South Dakota. Jefferson has a 2025 population of 102. Jefferson is currently growing at a rate of 3.03% annually and its population has increased by 12.09% since the most recent census, which recorded a population of 91 in 2020.

The average household income in Jefferson is $82,940 with a poverty rate of 15.63%. The median age in Jefferson is 48.8 years: 41 years for males, and 48.8 years for females.

102
Total Population
3
Density (mi²)
3 3.03%
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 (100.0%)

Race
Population
Percentage (of total)
White32100%

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 $41,875. Household income levels show a median of $110,313. The poverty rate stands at 15.63%.

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
Families$110,938$93,000
Married Families$110,938-
Households$110,313$82,940
Non Families--

$41,875

Average Income

$110,313

Median Household Income

15.63%

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)