SenecaSD
A town of 24, settled in 1886.
Is Seneca a good place to live?
Seneca has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
24 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
Moving to Seneca: who provides what
Who provides power, water and the rest in Seneca, 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.
The data
Ordered by what stands out in Seneca.
Seneca: snowy winters and pleasant summers
A winter brings about 43 inches of snow, with January nights at 5° and July afternoons at 84°.
Typical low → high °F
NOAA U.S. Climate Normals, 1991–2020
The biggest natural risk in Seneca is cold waves, at a low overall level
In Seneca, the natural-hazard score from FEMA is 37 of 100, below both South Dakota’s towns (54 of 100) and U.S. towns (44 of 100). FEMA puts 42% of the town’s expected hazard losses down to cold waves, and 23% to inland flooding. One declared disaster, in 2005, has brought federal aid to Seneca households.
FEMA disaster declarations and aid · FEMA National Risk Index · OpenFEMA
A larger share of adults have diabetes in Seneca than in most of South Dakota or the rest of the country
28% of adults sleep under 7 hours in Seneca, below both the South Dakota town median (30%) and the median of U.S. towns (36%). Among adults locally, 48% have high blood pressure. Only 2 of the 36 South Dakota towns we compare have a higher share of adults who report frequent physical distress than Seneca. CDC measures, 26 in all: Seneca beats South Dakota on 6 and trails on 11.
| Seneca | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Diabetes (CDC PLACES) | 18% | 10% | 12% |
| High blood pressure (CDC PLACES) | 48% | 31% | 35% |
| Binge drink (CDC PLACES) | 13% | 19% | 16% |
| Frequent mental distress (CDC PLACES) | 12% | 15% | 17% |
| What stands out | Seneca | SD |
|---|---|---|
| Fewer binge drinkers | 13.3% | 18.8% |
| Fewer adults in frequent mental distress | 11.8% | 15.3% |
| More adults with heart disease | 12.4% | 6.8% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Everything we know about Seneca
Colleges nearby
None within 15 miles of Seneca; the nearest are
About 0 of every 100 Seneca residents are enrolled in college, against 5 across South Dakota.
About Seneca
Town in South Dakota, United States
Seneca is a town in Faulk County, South Dakota, United States. The population was 22 at the 2020 census.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 0.4 sq mi
- Elevation
- 1,906 ft
- ZIP code
- 57473
- Area code
- 605
Questions about Seneca
Short answers, built from the data on this page.
Is Seneca, SD a good place to live?
Seneca has fewer than 1,000 residents, too few for fair grades; the figures below are still real.