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 2025 population of 2,767 . It is also the county seat of Monona County . Onawa is currently declining at a rate of -1% annually and its population has decreased by -4.72% since the most recent census, which recorded a population of 2,904 in 2020.

The average household income in Onawa is $65,673 with a poverty rate of 16.11%. The median age in Onawa is 36.3 years: 35.9 years for males, and 36.7 years for females. For every 100 females there are 85.4 males.

2.8K
Total Population
525
Density (mi²)
-28 -1%
Growth

Onawa Population

Onawa Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Onawa includes 93.89% White, and smaller percentages for Black or African American, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

White (93.89%)

Two or more races (5.28%)

Black or African American (0.45%)

Native Hawaiian or Pacific Islander (0.21%)

Native American (0.17%)

Race
Population
Percentage (of total)
White2,68793.89%
Two or more races1515.28%
Black or African American130.45%
Native Hawaiian or Pacific Islander60.21%
Native American50.17%

Onawa Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Onawa's average per capita income is $39,542. Household income levels show a median of $54,659. The poverty rate stands at 16.11%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$79,500-
Families$67,946$81,531
Households$54,659$65,673
Non Families$28,409$36,528

$39,542

Average Income

$54,659

Median Household Income

16.11%

Poverty Rate

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)