Jefferson township Flag

Jefferson township

County:
Union County
County Seat:
No
Area (mi²):
47.679
State:
South Dakota

Jefferson township is located in Union County, South Dakota. Jefferson township has a 2026 population of 48. Jefferson township is currently declining at a rate of -2.04% annually and its population has decreased by -5.88% since the most recent census, which recorded a population of 51 in 2020.

The median age in Jefferson township is 31.9 years: 32.5 years for males, and 31.7 years for females. For every 100 females there are 95.1 males.

48
Total Population
1.0
Density (mi²)
-1 -2.04%
Growth

Jefferson township Population

Jefferson township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202648-1-2.04%
202549-1-2%
202450-1-1.96%
20235112%
20225000%
202150-1-1.96%
20205100%
20196323.28%
201861-1-1.61%
20176200%
201662-1-1.59%
201563-1-1.56%
201464-1-1.54%
20136511.56%
20126423.23%
20116211.64%
20106100%

Median Age

Overall: 31.9 years
Female: 31.7 years
Male: 32.5 years

Jefferson township Adults

There are 80 adults, (2 of whom are seniors) in Jefferson township.

Sex Ratio

Female: 61 (51.3%)
Male: 58 (48.7%)

Demographics

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

Population by Race

Race
Population ↓
Percentage (of total)
White119100%
Race
Population ↓
Percentage (of total)
White119100%

Jefferson township Marital Status

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)