Onawa city, Iowa Demographics & Population 2026

Population Overview

Onawa city is a small community located in Iowa, within Monona County. The total population is 2,862. It ranks as the 125th most populous out of 1,018 cities and towns in Iowa.

Age Demographics

The median age in Onawa city is 36.3 years. This is 6% lower than the state median of 38.6 years. 11.2% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Onawa city is $54,659. This is 25% lower than the state median of $73,147. Compared to the national median of $78,538, household income here is 30% lower. The poverty rate stands at 16.1%. This is 47% higher than the state poverty rate of 11.0%. The unemployment rate is 1.3%. This is 65% lower than the state rate of 3.6%. The median home value is $125,700. Housing costs are 36% lower than the state median of $195,900. With a home-value-to-income ratio of just 2.3x, Onawa city is one of the most affordable housing markets in the area. 72.7% of occupied housing units are owner-occupied. This homeownership rate is 2% higher than the state average of 71.5%.

Race & Ethnicity

Onawa city has a predominantly White (non-Hispanic) population, comprising 92.6% of all residents. Hispanic or Latino residents account for 2.2%. The Black or African American population (0.4%) is well below the state average of 3.8%. The Hispanic or Latino population (2.2%) is well below the state average of 7.0%.

Education

16.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 46% lower than the state rate of 30.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.2%.

Data Sources & Methodology

All demographic data for Onawa city, Iowa is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Iowa state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,018 Census-designated places in Iowa. For official data, visit data.census.gov.