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 2,740. It is also the county seat of Monona County. Onawa is currently declining at a rate of -0.98% annually and its population has decreased by -5.65% since the most recent census, which recorded a population of 2,904 in 2020.

The median household income in Onawa is $62,143 with a poverty rate of 16.25%. The median age in Onawa is 35.5 years: 34.3 years for males, and 37.8 years for females. For every 100 females there are 85.0 males.

2.7K
Total Population
520
Density (mi²)
-27 -0.98%
Growth

Onawa Population

Onawa Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20262,740-27-0.98%
20252,767-28-1%
20242,795-25-0.89%
20232,820-6-0.21%
20222,826-30-1.05%
20212,856-52-1.79%
20202,9041324.76%
20192,772-4-0.14%
20182,776-30-1.07%
20172,806-22-0.78%
20162,828-26-0.91%
20152,854-9-0.31%
20142,863-43-1.48%
20132,906-27-0.92%
20122,933-59-1.97%
20112,992-9-0.3%
20103,00130.1%
20003,0911555.28%
19902,936-347-10.57%
19803,2831294.09%
19703,154-22-0.69%
19603,176-322-9.21%
19503,498601.75%
19403,43890035.46%
19302,53800%

Median Age

Overall: 35.5 years
Female: 37.8 years
Male: 34.3 years

Onawa Adults

There are 2,111 adults, (609 of whom are seniors) in Onawa.

Sex Ratio

Female: 1,535 (54.1%)
Male: 1,304 (45.9%)

Demographics

The racial composition of Onawa includes 94.05% White, and smaller percentages for Black or African American, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White2,67094.05%
Two or more races1495.25%
Black or African American140.49%
Native American60.21%
Race
Population ↓
Percentage (of total)
Two or more races431.51%
Race
Population ↓
Percentage (of total)
White2,67094.05%
Two or more races1063.73%
Black or African American140.49%
Native American60.21%

Onawa Marital Status

Economics and Income Statistics

Onawa 's average per capita income is $39,338. Household income levels show a median of $62,143. The poverty rate stands at 16.25%.

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$82,784-
Families$74,120$84,743
Households$62,143$69,895
Non Families$34,696$41,529

$39,338

Average Income

$62,143

Median Household Income

16.25%

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)