SDMap-doton-Grenville, 2004
Grenville Township’s story
112 years in pictures
Census counts: 247 in 1930, 48 in 2020. The archive holds 1 old photo or paper going back to 2004 and 2 maps from 1970 on.
- 1914Grenville Township is laid out
Grenville TownshipSD
A town of 82, laid out in 1914.
Population
82
2025 Census estimate · +3.8% since 2020
Median home value
$276K
Census ACS
Household income
$116K
median
Median age
60.7
years
Land area
0 sq mi
Is Grenville Township a good place to live?
Grenville Township’s median age is 60.7 years, where South Dakota’s towns sit at 39.5 years and U.S. towns at 40.5 years. No town among the 36 in South Dakota we compare has a lower share of adults with a bachelor’s degree than Grenville Township. 31% of the land in Grenville Township is conserved, above both the South Dakota town median (3.3%) and the median of U.S. towns (4.3%). Grenville Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
Small town
82 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
Nearby towns
RoslynNutley TownshipRaritan TownshipRacine TownshipKosciusko TownshipGrenville Township
Getting set up
The full setup list →Moving to Grenville Township: who provides what
Who provides power, water and the rest in Grenville Township, and how to reach them.
PowerNorthWestern Energy13.3¢/kWh · EIA 2025HIFLD · EIA
WaterWEB WaterNo health-based violations in 5 years · EPAEPA
Internet4 providers100% of addresses get 100/20 MbpsFCC
Trash & dumpNot on file yetWe don’t have Grenville Township’s trash rules yet
Register to voteIn personSouth Dakota has no online registration; you can register in person until 15 days before Election Day or by mail (received 15 days before).vote.govWho runs elections hereDay County AuditorDay County; contacts on the Handbook page.FVAP, Jul 2023
ZIP codes57274, 57239, 5726157274 66% · 57239 18% · 57261 15%Census 2020
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 Grenville Township.
Outdoors
Nearly a third of Grenville Township is conserved land
0.0 miles of trail in 1 park or preserve. The biggest park or preserve is Waubay National Wildlife Refuge, at 31 acres.
30.7%conserved
30.7%
conserved · 7,726 of 25,173 acres
0.0 mi
of trails · 0 per sq mi
| Biggest places to walk | Trails | Acres |
|---|---|---|
| 1. Waubay National Wildlife Refuge | — | 31 |
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Climate
Grenville Township stands out in South Dakota and nationally: a typical July afternoon there is cooler
Grenville Township’s July high is 80°F. Grenville Township has cold, snowy winters and pleasant summers.
36″snow a winter
Typical low → high °F
Winter5–23°
Spring31–52°
Summer57–78°
Fall34–55°
Oct 12
typical first frost
May 1
typical last frost
+1.1°
vs. the 20th-century average
NOAA U.S. Climate Normals, 1991–2020
Health
A larger share of adults in Grenville Township have high blood pressure than in the typical South Dakota or U.S. town
41% of Grenville Township adults have high blood pressure. Among 36 South Dakota towns, just 2 have a higher share of adults who have diabetes than Grenville Township. 20% of Grenville Township adults have been diagnosed with depression.
| Grenville Township | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Diabetes (CDC PLACES) | 15% | 10% | 12% |
| High blood pressure (CDC PLACES) | 41% | 31% | 35% |
| Binge drink (CDC PLACES) | 15% | 19% | 16% |
| Sleep under 7 hours (CDC PLACES) | 29% | 30% | 36% |
26 measures vs. South Dakota
3 better15 too close to call8 worse
| What stands out | Grenville Township | SD |
|---|---|---|
| Fewer binge drinkers | 15.2% | 18.8% |
| More adults treating high blood pressure | 81.9% | 75.9% |
| More adults with heart disease | 10% | 6.8% |
Sanford Hospital Webster - Cah
10 mi away · emergency room
3 of 3
care shortages: primary care, dental, mental health
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Natural hazards
Inland flooding leads a moderate hazard risk in Grenville Township
Expected storm and flood damage is lower than in 59% of U.S. communities.
41risk score of 100
FEMA risk score
Inland floodingCold wavesStrong wind
FEMA National Risk Index · OpenFEMA
Keep exploring
Everything we know about Grenville Township
17pages on Grenville Township
The big questions
Out and about
After high school
Colleges nearby
None within 15 miles of Grenville Township; the nearest are
Sisseton Wahpeton CollegeUniversity or college · Public · Sisseton18.5 mi$4,330 in-state tuitionLake Area Technical CollegeCommunity college · Public · Watertown41.9 mi$6,718 in-state tuition
About 0 of every 100 Grenville Township residents are enrolled in college, against 5 across South Dakota.
About Grenville Township
Town in South Dakota, United States
Grenville is a town in Day County, South Dakota, United States. The population was 48 at the 2020 census. Grenville was laid out in 1914, and named for the greenery of the original town site.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 0.2 sq mi
- Elevation
- 1,864 ft
- ZIP code
- 57239
- Area code
- 605
Questions about Grenville Township
Short answers, built from the data on this page.
Is Grenville Township, SD a good place to live?
Grenville Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.