Onida is a city in Sully County, South Dakota, home to about 644 people across 0.7 square miles. Its ZIP code is 57564.
Mostly Onida
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| Nearest major airport | Eppley Airfield (OMA)317 miles away |
|---|---|
| Closer regional airport | Pierre Regional Airport (PIR)25 miles away |
| Nearest city of 250,000+ | Omaha, NE314 miles away |
| Nearest city of 1 million+ | Chicago, IL655 miles away |
Straight-line distances from the center of Onida; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Onida had 666 residents in the 2020 census, down 10% since 2000.
It’s the 129th largest of 440 towns in South Dakota by population.
Sully County grew from 1,715 residents in 1900 to 1,446 in 2020.
Sully County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 7°F. About 21.1 inches of rain and melted snow fall in a typical year, with about 49 inches of snow.
Source: NOAA 1991–2020 climate normals, Onida 4 Nw, SD weather station (3 miles away).
304 jobs at 67 businesses in Sully County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
4 doctors and other health care providers list an office in Onida.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 1 |
|---|---|
| Chiropractors | 3 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Libraries
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Agar-Blunt-Onida School District 58-3. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Onida Elementary - 04Onida | K–5 | 79 | Public | 1.7 mi |
| Sully Buttes Middle School - 06Onida | 6–8 | 66 | Public | 1.7 mi |
| Sully Buttes High School - 07Onida | 9–12 | 71 | Public | 1.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.