Warner, South Dakota Demographics & Population 2026

A note before these figures: with a population of 512, Warner'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

Warner is a small community located in South Dakota, within Brown County. The total population is 512. It ranks as the 150th most populous out of 439 Census-designated places in South Dakota.

Age Demographics

The median age in Warner is 34.4 years. This is 9% lower than the state median of 38.0 years. With 34.8% of the population under 18, Warner has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Warner is $113,750. This is 52% higher than the state median of $75,081. It is also 41% higher than the national median of $80,734. The poverty rate stands at 0.4%. This is 97% lower than the state poverty rate of 11.9%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Warner, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $268,100. Housing costs are 4% higher than the state median of $257,400. With a home-value-to-income ratio of just 2.4x, Warner is one of the most affordable housing markets in the area. 94.9% of occupied housing units are owner-occupied. This homeownership rate is 38% higher than the state average of 68.6%.

Race & Ethnicity

Warner has a predominantly White (non-Hispanic) population, comprising 97.3% of all residents.

Education

42.7% of residents aged 25 and older hold a bachelor's degree or higher. This places Warner in the top 10% of all cities in the state for educational attainment. This is 34% higher than the state rate of 31.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 98.7%. Notably, 15.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Warner, South Dakota 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 South Dakota state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 439 Census-designated places in South Dakota. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.