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 2026 population of 39. Olean township is currently declining at a rate of -2.5% annually and its population has decreased by -9.3% since the most recent census, which recorded a population of 43 in 2020.

39
Total Population
1.1
Density (mi²)
-1 -2.5%
Growth

Olean township Population

Olean township Population

Year ↓
Population
Growth
Annual Change
202639-1-2.5%
202540-1-2.44%
20244100%
202341-1-2.38%
20224200%
202142-1-2.33%
20204300%
201931-1-3.13%
20183200%
20173200%
201632-1-3.03%
20153313.13%
20143200%
20133200%
20123213.23%
20113100%
20103100%

Median Age

Overall: 0 years
Female: 0 years
Male: 0 years

Olean township Adults

There are 0 adults, (0 of whom are seniors) in Olean township.

Sex Ratio

Female: 0 (NaN%)
Male: 0 (NaN%)

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)