Each edition grades its towns against each other only.
Home to 2 places on the National Register of Historic Places.
34% of working residents work locally in Onida, above both South Dakota’s towns (29%) and U.S. towns (8%). Its National Register listings include Jacob D. Goosen Barn and L. E. Snyder House. Onida has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
Where Onida beats most towns.
In a town this size, neighbors are the best guide. Ask them anything.
Census counts: 319 in 1910, 666 in 2020. The archive holds 5 old photos and papers going back to 1911 and a map from 1986 on.
2 places on the National Register of Historic Places.
Who provides power, water and the rest in Onida, and how to reach them.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Aug 3, 2026.
Ordered by what stands out in Onida.
The typical Onida home is worth about $244,000, up 2.3% in a year, 23% below the South Dakota typical home. 80% of Onida households own their home, above both the South Dakota town median (68%) and the median of U.S. towns (73%).
| Onida | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Households that own their home | 80% | 68% | 73% |
| Median rent | $939 a month | $962 a month | $1,185 a month |
Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center
Its public schools are run by the Agar-Blunt-Onida School District 58-3.
| School | Level | Students | Letter |
|---|---|---|---|
| Onida Elementary - 04Largest public elementary schoolGrades K–5 | Grades K–5 | 79 | A |
| Sully Buttes High School - 07Largest public high schoolGrades 9–12 | Grades 9–12 | 71 | A+ |
NCES · EDFacts
Onida has cold, snowy winters and warm summers, with very little rain. July afternoons reach 86°, January nights drop to 7° and about 49 inches of snow falls in a winter.
NOAA U.S. Climate Normals, 1991–2020
Expected storm and flood damage is higher than in 67% of U.S. communities. One flood insurance claim has been paid in Onida since 2010.
FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
About one in 3 of Onida’s working residents works in town. 4.9% of residents live below the poverty line in Onida. Jobs based in Onida grew to 320 in 2023, 43 more than in 2013.
| Onida | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Below the poverty line | 4.9% | 9.5% | 9.6% |
| Average trip to work | 18 minutes | 17 minutes | 25 minutes |
| Median household income | $70,000 | $72,000 | $80,000 |
Census LEHD 2023 · ACS
Adults 18 to 34 are 16% of residents (22% statewide); people 65 and older are 22% of residents (18% statewide). 27% of Onida residents are under 18. Onida has lost 3.6% of its people since 2020, down to 640 in the Census Bureau’s 2025 estimate.
| Onida | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Under 18 | 27% | 22% | 22% |
| Aged 65 or older | 22% | 19% | 18% |
| Median age | 42.2 years | 39.5 years | 40.5 years |
49% women, 51% men
That’s an even split within the survey’s margin of ±3.4 points. Across South Dakota, 49.2% of residents are women.
| Onida | SD | U.S. | |
|---|---|---|---|
| Under 10 | 14.6% | 13.1% | 11.6% |
| 10 to 17 | 12.6% | 11.2% | 10.3% |
| 18 to 24 | 4% | 9.3% | 9.1% |
| 25 to 34 | 12.1% | 12.6% | 13.7% |
| 35 to 44 | 9% | 12.6% | 13.2% |
| 45 to 54 | 9.3% | 10.7% | 12.2% |
| 55 to 64 | 16% | 12.6% | 12.7% |
| 65 to 74 | 11.3% | 11% | 10.2% |
| 75 and older | 11% | 7% | 7% |
| No diploma | 4.1% | 6.8% | 10.4% |
| High school | 24.8% | 29% | 26% |
| Some college | 18.5% | 19.9% | 19.1% |
| Associate’s | 23% | 12.3% | 8.8% |
| Bachelor’s | 22.6% | 21.9% | 21.6% |
| Graduate | 7% | 10% | 14.1% |
Census population estimates, 2025 · U.S. Census Bureau · ACS 2020-2024 5-year estimates · in a town of 600, single groups can be off by several points
Onida beats the South Dakota average on 1 of 26 CDC measures and trails it on 0.
| Onida | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Binge drink (CDC PLACES) | 19% | 19% | 16% |
| Depression (CDC PLACES) | 21% | 22% | 23% |
| Frequent mental distress (CDC PLACES) | 15% | 15% | 17% |
| Yearly checkup (CDC PLACES) | 76% | 76% | 79% |
| What stands out | Onida | SD |
|---|---|---|
| Fewer older adults who have lost all their teeth | 8.3% | 12.7% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
None within 15 miles of Onida; the nearest are
About 2 of every 100 Onida residents are enrolled in college, against 5 across South Dakota.
2 places in Onida on the National Register of Historic Places.
3 notable people were born in Onida.
City in South Dakota, United States
Onida is a city in and the county seat of Sully County, South Dakota, United States. The population was 666 as of the 2020 census.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
Short answers, built from the data on this page.
Onida has fewer than 1,000 residents, too few for fair grades; the figures below are still real. Home to 2 places on the National Register of Historic Places.
3 notable people were born here, including Curt Byrum and Ray Jennison.
