Underwood, Iowa Demographics & Population 2026

A note before these figures: with a population of 898, Underwood's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Underwood is a small community located in Iowa, within Pottawattamie County. The total population is 898. It ranks as the 320th most populous out of 1,017 Census-designated places in Iowa.

Age Demographics

The median age in Underwood is 33.5 years. This is 13% lower than the state median of 38.6 years. With 34.3% of the population under 18, Underwood has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Underwood is $105,341. This is 40% higher than the state median of $75,059. It is also 30% higher than the national median of $80,734. The poverty rate stands at 3.3%. This is 70% lower than the state poverty rate of 11.1%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Underwood, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $253,500. Housing costs are 22% higher than the state median of $208,000. With a home-value-to-income ratio of just 2.4x, Underwood is one of the most affordable housing markets in the area. 83.5% of occupied housing units are owner-occupied. This homeownership rate is 16% higher than the state average of 71.7%.

Race & Ethnicity

Underwood has a predominantly White (non-Hispanic) population, comprising 94.3% of all residents. Hispanic or Latino residents account for 3.5%. The Hispanic or Latino population (3.5%) is well below the state average of 7.3%.

Education

35.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 12% higher than the state rate of 31.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.0%.

Data Sources & Methodology

All demographic data for Underwood, Iowa is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Iowa state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,017 Census-designated places in Iowa. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.