Jefferson township Flag

Jefferson township

County:
Union County
County Seat:
No
Area (mi²):
38.794
State:
South Dakota

Jefferson township is located in Union County, South Dakota. Jefferson township has a 2026 population of 1,267. Jefferson township is currently growing at a rate of 2.34% annually and its population has increased by 14.14% since the most recent census, which recorded a population of 1,110 in 2020.

The median household income in Jefferson township is $196,442 with a poverty rate of 1.96%. The median age in Jefferson township is 43.6 years: 45.7 years for males, and 43 years for females. For every 100 females there are 85.7 males.

1.3K
Total Population
33
Density (mi²)
29 2.34%
Growth

Jefferson township Population

Jefferson township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,267292.34%
20251,238292.4%
20241,209292.46%
20231,180221.9%
20221,158322.84%
20211,126161.44%
20201,11060.54%
20191,134413.75%
20181,093333.11%
20171,060212.02%
20161,039262.57%
20151,013-4-0.39%
20141,017202.01%
201399780.81%
2012989202.06%
2011969262.76%
201095090.96%

Median Age

Overall: 43.6 years
Female: 43 years
Male: 45.7 years

Jefferson township Adults

There are 755 adults, (84 of whom are seniors) in Jefferson township.

Sex Ratio

Female: 586 (53.9%)
Male: 502 (46.1%)

Demographics

The racial composition of Jefferson township includes 98.81% White, and smaller percentages for other race and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White1,07598.81%
Other race131.19%
Race
Population ↓
Percentage (of total)
White181.65%
Other race131.19%
Race
Population ↓
Percentage (of total)
White1,05797.15%

Jefferson township Marital Status

Economics and Income Statistics

Jefferson township 's average per capita income is $103,960. Household income levels show a median of $196,442. The poverty rate stands at 1.96%.

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$220,508-
Families$220,400$216,857
Households$196,442$195,647
Non Families--

$103,960

Average Income

$196,442

Median Household Income

1.96%

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)