Oak Lake township Flag

Oak Lake township

County Seat:
No
Area (mi²):
35.805

Oak Lake township is located in Brookings County, South Dakota. Oak Lake township has a 2026 population of 105. Oak Lake township is currently growing at a rate of 2.94% annually and its population has increased by 12.9% since the most recent census, which recorded a population of 93 in 2020.

The median household income in Oak Lake township is $133,125 with a poverty rate of 0%.The median age in Oak Lake township is 60 years: 54.5 years for males, and 60.1 years for females. For every 100 females there are 142.2 males.

105
Total Population
2.9
Density (mi²)
3 2.94%
Growth

Oak Lake township Population

Oak Lake township Population

Year↓
Population
Growth
Annual Change
202610532.94%
202510233.03%
20249922.06%
20239711.04%
20229633.23%
20219300%
20209300%
2019105-1-0.94%
201810600%
201710621.92%
201610400%
201510410.97%
2014103-1-0.96%
201310410.97%
201210321.98%
201110111%
201010200%

Median Age

Overall:60 years
Female:60.1 years
Male:54.5 years

Oak Lake township Adults

There are 84 adults, (32 of whom are seniors) in Oak Lake township.

Sex Ratio

Female: 45 (41.3%)
Male: 64 (58.7%)

Demographics

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

Population by Race

Race
Population↓
Percentage (of total)
White109100%
Race
Population↓
Percentage (of total)
White109100%

Oak Lake township Marital Status

Economics and Income Statistics

Oak Lake township's average per capita income is $93,382. Household income levels show a median of $133,125. 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
Households$133,125$182,934
Families$133,125$182,934
Married Families$133,125-
Non Families--

$93,382

Average Income

$133,125

Median Household Income

0%

Poverty Rate

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)