Astoria, South Dakota Demographics & Population 2026

A note before these figures: with a population of 142, Astoria'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

Astoria is a small community located in South Dakota, within Deuel County. The total population is 142. It ranks as the 268th most populous out of 439 Census-designated places in South Dakota.

Age Demographics

The median age in Astoria is 48.3 years. This is 27% higher than the state median of 38.0 years. 16.9% 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 Astoria is $38,750. This is 48% lower than the state median of $75,081. It is also 52% lower than the national median of $80,734. The poverty rate stands at 19.7%. This is 65% higher than the state poverty rate of 11.9%. The survey records no unemployed residents in Astoria, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $117,000. Housing costs are 55% lower than the state median of $257,400. The home-value-to-income ratio is 3.0x. 80.3% of occupied housing units are owner-occupied. This homeownership rate is 17% higher than the state average of 68.6%.

Race & Ethnicity

Astoria has a predominantly White (non-Hispanic) population, comprising 89.4% of all residents. Hispanic or Latino residents account for 9.2%. The Hispanic or Latino population is significantly higher than the state average (9.2% vs 4.8%).

Education

16.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 49% lower 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 88.5%.

Data Sources & Methodology

All demographic data for Astoria, 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.