Diagonal city, Iowa Demographics & Population 2026

Population Overview

Diagonal city is a small community located in Iowa. The total population is 481. It ranks as the 478th most populous out of 1,018 cities and towns in Iowa.

Age Demographics

The median age in Diagonal city is 47.2 years. This is 22% higher than the state median of 38.6 years. 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 Diagonal city is $80,417. This is 10% higher than the state median of $73,147. Compared to the national median of $78,538, household income here is 2% higher. The poverty rate stands at 6.3%. This is 42% lower than the state poverty rate of 11.0%. The unemployment rate is 5.2%. This is 43% higher than the state rate of 3.6%. The median home value is $84,400. Housing costs are 57% lower than the state median of $195,900. With a home-value-to-income ratio of just 1.0x, Diagonal city is one of the most affordable housing markets in the area. 89.4% of occupied housing units are owner-occupied. This homeownership rate is 25% higher than the state average of 71.5%.

Race & Ethnicity

The largest racial or ethnic group in Diagonal city is White (non-Hispanic), making up 83.0% of the population. Hispanic or Latino residents account for 3.1%. The Hispanic or Latino population (3.1%) is well below the state average of 7.0%.

Education

15.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 48% 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 89.9%.

Data Sources & Methodology

All demographic data for Diagonal 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.