Jefferson Flag

Jefferson

County:
Union County
County Seat:
No
Area (mi²):
35.849
State:
South Dakota

Jefferson is located in Union County, South Dakota. Jefferson has a 2025 population of 177. Jefferson is currently growing at a rate of 1.72% annually and its population has increased by 5.99% since the most recent census, which recorded a population of 167 in 2020.

The average household income in Jefferson is $104,324 with a poverty rate of 0%. The median age in Jefferson is 48.8 years: 37.3 years for males, and 54.5 years for females.

177
Total Population
5
Density (mi²)
3 1.72%
Growth

Jefferson Population

Jefferson Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Jefferson includes 82.47% White, 14.43% Black or African American, 3.09% Native American, and smaller percentages for and multiracial populations.

Population by Race

White (82.5%)

Black or African American (14.4%)

Native American (3.1%)

Race
Population
Percentage (of total)
White16082.47%
Black or African American2814.43%
Native American63.09%

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 $52,404. Household income levels show a median of $101,250. The poverty rate stands at 0%.

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$112,614-
Families$105,833$120,770
Households$101,250$104,324
Non Families--

$52,404

Average Income

$101,250

Median Household Income

0%

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)