Union township Flag

Union township

County:
Day County
County Seat:
No
Area (mi²):
35.59
State:
South Dakota

Union township is located in Day County, South Dakota. Union township has a 2026 population of 71. Union township is currently declining at a rate of -1.39% annually and its population has decreased by -2.74% since the most recent census, which recorded a population of 73 in 2020.

The median age in Union township is 70.1 years: 70.1 years for males, and 65.8 years for females. For every 100 females there are 223.5 males.

71
Total Population
2.0
Density (mi²)
-1 -1.39%
Growth

Union township Population

Union township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202671-1-1.39%
202572-1-1.37%
202473-1-1.35%
202374-1-1.33%
20227534.17%
202172-1-1.37%
20207300%
201948-1-2.04%
20184912.08%
20174800%
20164800%
20154812.13%
201447-1-2.08%
20134800%
20124800%
20114800%
20104800%

Median Age

Overall: 70.1 years
Female: 65.8 years
Male: 70.1 years

Union township Adults

There are 53 adults, (30 of whom are seniors) in Union township.

Sex Ratio

Female: 17 (30.9%)
Male: 38 (69.1%)

Demographics

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

Population by Race

Race
Population ↓
Percentage (of total)
White55100%
Race
Population ↓
Percentage (of total)
White55100%

Union 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)