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 2026 population of 644. Onida is currently declining at a rate of -1.98% annually and its population has decreased by -3.45% since the most recent census, which recorded a population of 667 in 2020.

644
Total Population
958
Density (mi²)
-13 -1.98%
Growth

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)