Spencer city, Iowa Demographics & Population 2026

Population Overview

Spencer city is a small city located in Iowa, within Clay County. The total population is 11,393. It ranks as the 35th most populous out of 1,018 cities and towns in Iowa.

Age Demographics

The median age in Spencer city is 41.3 years. This is 7% higher than the state median of 38.6 years. 10.6% 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 Spencer city is $57,068. This is 22% lower than the state median of $73,147. Compared to the national median of $78,538, household income here is 27% lower. The poverty rate stands at 14.1%. This is 28% higher than the state poverty rate of 11.0%. The unemployment rate is 5.1%. This is 42% higher than the state rate of 3.6%. The median home value is $178,300. Housing costs are 9% lower than the state median of $195,900. The home-value-to-income ratio is 3.1x. 67.7% of occupied housing units are owner-occupied. This homeownership rate is 5% lower than the state average of 71.5%.

Race & Ethnicity

Spencer city has a predominantly White (non-Hispanic) population, comprising 90.4% of all residents. Hispanic or Latino residents account for 5.5%. The Black or African American population (0.7%) is well below the state average of 3.8%. The Asian population (0.4%) is well below the state average of 2.4%.

Education

28.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 9% 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 95.2%.

Data Sources & Methodology

All demographic data for Spencer 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.