Onawa Flag

Onawa

County:
Monona County
County Seat:
Yes
Area (mi²):
5.268
State:
Iowa

Onawa is a city located in Monona County, Iowa. Onawa has a 2026 population of 2,795. It is also the county seat of Monona County. Onawa is currently declining at a rate of -0.89% annually and its population has decreased by -3.75% since the most recent census, which recorded a population of 2,904 in 2020.

2.8K
Total Population
531
Density (mi²)
-25 -0.89%
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)