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 2,756. It is also the county seat of Monona County. Onawa is currently declining at a rate of -1.08% annually and its population has decreased by -5.16% since the most recent census, which recorded a population of 2,906 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.

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

Race	Population	Percentage (of total)
White	2,687	93.89%
Two or more races	151	5.28%
Black or African American	13	0.45%
Native Hawaiian or Pacific Islander	6	0.21%
Native American	5	0.17%

Onawa Marital Status

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