Onaga city, Kansas Demographics & Population 2026

Population Overview

Onaga city is a small community located in Kansas. The total population is 680. It ranks as the 254th most populous out of 726 cities and towns in Kansas.

Age Demographics

The median age in Onaga city is 58.3 years. This is 57% higher than the state median of 37.2 years. Only 13.8% of residents are under 18, indicating fewer families with children. 21.8% 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 Onaga city is $46,042. This is 37% lower than the state median of $72,639. Compared to the national median of $78,538, household income here is 41% lower. The poverty rate stands at 12.9%. This is 12% higher than the state poverty rate of 11.5%. The unemployment rate is 2.5%. This is 37% lower than the state rate of 3.9%. The median home value is $95,400. Housing costs are 53% lower than the state median of $203,400. With a home-value-to-income ratio of just 2.1x, Onaga city is one of the most affordable housing markets in the area. 49.6% of occupied housing units are owner-occupied. This homeownership rate is 26% lower than the state average of 66.9%.

Race & Ethnicity

Onaga city has a predominantly White (non-Hispanic) population, comprising 92.5% of all residents. Asian residents account for 3.1%. The Hispanic or Latino population (1.6%) is well below the state average of 13.3%.

Education

28.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 19% lower than the state rate of 35.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.4%.

Data Sources & Methodology

All demographic data for Onaga city, Kansas 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 Kansas state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 726 Census-designated places in Kansas. For official data, visit data.census.gov.