Each edition grades its towns against each other only.
A town of 40, laid out in 1887.
Eureka Township’s midpoint age is 77.7 years, above both the South Dakota town median (39.5 years) and the median of U.S. towns (40.5 years). Of the 36 South Dakota towns we compare, none has a higher share of homes lived in by their owners than Eureka Township. Eureka Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
In a town this size, neighbors are the best guide. Ask them anything.
Census counts: 552 in 1890, a peak of 1,576 in 1950, 813 in 2020. The archive holds 1 old photo or paper going back to 2004 and a map from 1986 on.
Who provides power, water and the rest in Eureka Township, 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 Eureka Township.
The July high for Eureka Township comes to 86°F, where South Dakota’s towns sit at 85°F and U.S. towns at 85°F.
NOAA U.S. Climate Normals, 1991–2020
15% of adults smoke cigarettes in Eureka Township. On the CDC’s 26 measures, Eureka Township is ahead of South Dakota on 3 and behind on 5. Only 2 of the 36 South Dakota towns we compare have a higher share of adults who had a checkup this year than Eureka Township. Among adults in the town, 14% have diabetes and 19% have been diagnosed with depression.
| Eureka Township | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Sleep under 7 hours (CDC PLACES) | 28% | 30% | 36% |
| Diabetes (CDC PLACES) | 14% | 10% | 12% |
| Depression (CDC PLACES) | 19% | 22% | 23% |
| Frequent mental distress (CDC PLACES) | 14% | 15% | 17% |
| What stands out | Eureka Township | SD |
|---|---|---|
| Fewer older adults who have lost all their teeth | 10.2% | 12.7% |
| More adults treating high blood pressure | 79.7% | 75.9% |
| More adults with heart disease | 8.7% | 6.8% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Expected damage from storms and floods is lower here than in 52% of U.S. communities. Paid flood insurance claims in Eureka Township since 2019: 2. FEMA puts 43% of the town’s expected hazard losses down to cold waves, and 23% to inland flooding.
FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
None within 15 miles of Eureka Township; the nearest are
About 0 of every 100 Eureka Township residents are enrolled in college, against 5 across South Dakota.
Short answers, built from the data on this page.
Eureka Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.