Jefferson is a city located in Union County, South Dakota. Jefferson has a 2025 population of 431. Jefferson is currently declining at a rate of -1.82% annually and its population has decreased by -8.88% since the most recent census, which recorded a population of 473 in 2020.
The average household income in Jefferson is $78,129 with a poverty rate of 3.21%.The median age in Jefferson is 34 years: 33.6 years for males, and 38.5 years for females.
Data after 2023 is projected based on recent change
The racial composition of Jefferson includes 90.24% White, 4.18% Native American, and smaller percentages for other race and multiracial populations.
Race | Population | Percentage (of total) |
---|---|---|
White | 647 | 90.24% |
Native American | 30 | 4.18% |
Two or more races | 23 | 3.21% |
Other race | 17 | 2.37% |
Married
Widowed
Divorced
Separated
Never Married
Jefferson's average per capita income is $41,250. Household income levels show a median of $81,149. The poverty rate stands at 3.21%.
Name | Median | Mean |
---|---|---|
Married Families | $85,750 | - |
Families | $81,554 | $84,363 |
Households | $81,149 | $78,129 |
Non Families | $50,000 | $62,464 |
Average Income
Median Household Income
Poverty Rate