Onida city, South Dakota Demographics & Population 2026
As of 2026, Onida city, South Dakota has a total population of 658, the 124th largest city in South Dakota, with a median household income of $71,050, which is 2% lower than the state average. The poverty rate is 6.6%.
Key Takeaways
- Near full employment with an unemployment rate of just 0.0%.
Onida city Quick Facts
How Onida city Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 33 | National average: 60
Education
Educational Attainment (Adults 25+)
Onida city Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Sully County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Agar town | 86 | N/A | 18.6% | $107,500 |
Cities Similar to Onida city
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Corsica city | 654 | $65,893 | $126,800 | 27.7% | 7.5% |
| Faulkton city | 627 | $68,672 | $100,000 | 21.9% | 7.9% |
| Armour city | 647 | $64,250 | $93,300 | 26.6% | 16.3% |
| Plankinton city | 637 | $76,250 | $110,500 | 24.8% | 6.7% |
| Murdo city | 633 | $66,250 | $120,700 | 21.2% | 16.6% |
Population Overview
Onida city is a small community located in South Dakota, within Sully County. The total population is 658. It ranks as the 124th most populous out of 439 cities and towns in South Dakota.
Age Demographics
The median age in Onida city is 46.6 years. This is 24% higher than the state median of 37.7 years. 14.1% 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 Onida city is $71,050. This is 2% lower than the state median of $72,421. Compared to the national median of $78,538, household income here is 10% lower. The poverty rate stands at 6.6%. This is 45% lower than the state poverty rate of 12.0%. The unemployment rate is 0.0%. This is 100% lower than the state rate of 3.0%. The median home value is $187,000. Housing costs are 21% lower than the state median of $236,800. With a home-value-to-income ratio of just 2.6x, Onida city is one of the most affordable housing markets in the area. 83.9% of occupied housing units are owner-occupied. This homeownership rate is 22% higher than the state average of 68.6%.
Race & Ethnicity
Onida city has a predominantly White (non-Hispanic) population, comprising 94.5% of all residents. Black or African American residents account for 2.4%.
Education
25.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 17% lower than the state rate of 31.1%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.3%.
Data Sources & Methodology
All demographic data for Onida city, South Dakota 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 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. For official data, visit data.census.gov.
Free data download: Get all South Dakota city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Onida city, South Dakota?
Onida city, South Dakota has a population of 658 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Onida city, SD?
The median household income in Onida city is $71,050, which is 10% lower the national median of $78,538.
What is the poverty rate in Onida city, SD?
The poverty rate in Onida city is 6.6%. This means approximately 43 residents live below the federal poverty line.
What is the racial makeup of Onida city, South Dakota?
Onida city's population is 94.5% White, 2.4% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Onida city, SD?
The median home value in Onida city is $187,000. The home-value-to-income ratio is 2.6x.
How educated is Onida city, South Dakota?
25.7% of adults (25+) in Onida city hold a bachelor's degree or higher, and 5.5% hold a graduate or professional degree.