Onida Flag

Onida

County:
Sully County
County Seat:
No
Area (mi²):
0.672
State:
South Dakota

Onida is a city located in Sully County, South Dakota. Onida has a 2025 population of 654. Onida is currently declining at a rate of -0.3% annually and its population has decreased by -1.51% since the most recent census, which recorded a population of 664 in 2020.

The average household income in Onida is $95,527 with a poverty rate of 6.58%The median age in Onida is 46.6 years: 54.1 years for males, and 42.2 years for females.

654
Total Population
973
Density (mi²)
-2 -0.3%
Growth

Onida Population

Demographics

Economics and Income Statistics

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)