Olean township Flag

Olean township

County:
Spink County
County Seat:
No
Area (mi²):
36.088
State:
South Dakota

Olean township is located in Spink County, South Dakota. Olean township has a 2025 population of 38. Olean township is currently declining at a rate of -2.56% annually and its population has decreased by -9.52% since the most recent census, which recorded a population of 42 in 2020.

38
Total Population
1
Density (mi²)
-1 -2.56%
Growth

Olean township Population

Olean township Population

Data after 2023 is projected based on recent change

Demographics

Population by Race

Race
Population
Percentage (of total)
No results.

Olean township Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

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)