Sioux Rapids, Iowa Demographics & Population 2026

A note before these figures: with a population of 722, Sioux Rapids'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

Sioux Rapids is a small community located in Iowa, within Buena Vista County. The total population is 722. It ranks as the 384th most populous out of 1,017 Census-designated places in Iowa.

Age Demographics

The median age in Sioux Rapids is 50.5 years. This is 31% higher than the state median of 38.6 years. 11.9% 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 Sioux Rapids is $60,000. This is 20% lower than the state median of $75,059. It is also 26% lower than the national median of $80,734. The poverty rate stands at 6.1%. This is 45% lower than the state poverty rate of 11.1%. The unemployment rate is 0.8%. This is 77% lower than the state rate of 3.6%. The median home value is $88,700. Housing costs are 57% lower than the state median of $208,000. With a home-value-to-income ratio of just 1.5x, Sioux Rapids is one of the most affordable housing markets in the area. 81.8% of occupied housing units are owner-occupied. This homeownership rate is 14% higher than the state average of 71.7%.

Race & Ethnicity

Sioux Rapids has a predominantly White (non-Hispanic) population, comprising 87.1% of all residents. Hispanic or Latino residents account for 8.9%. The Black or African American population (1.0%) is well below the state average of 3.8%.

Education

18.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 41% lower 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 92.3%.

Data Sources & Methodology

All demographic data for Sioux Rapids, 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.