Grenville is a town in Day County, South Dakota, home to about 53 people across 0.2 square miles. It has no ZIP code of its own: it’s part of 57239 and 57274.
Homes sold for a median of $313 per square foot across 2 ZIP codes in the three months ending August 2026, and 1 of 2 were seller’s markets.
Part is in Grenville
Mostly Webster; part is in Grenville
Each card is that ZIP code’s whole market, including any part outside Grenville. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Grenville’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)206 miles away |
|---|---|
| Closer regional airport | Watertown Regional Airport (ATY)39 miles away |
| Nearest city of 250,000+ | Minneapolis, MN202 miles away |
| Nearest city of 1 million+ | Chicago, IL545 miles away |
Straight-line distances from the center of Grenville; 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.
Grenville had 48 residents in the 2020 census, down 23% since 2000.
It’s the 372nd largest of 440 towns in South Dakota by population.
Day County grew from 12,254 residents in 1900 to 5,449 in 2020.
Day County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 82°F in summer, and winter lows average 4°F. About 22.6 inches of rain and melted snow fall in a typical year, with about 36 inches of snow.
Source: NOAA 1991–2020 climate normals, Waubay Natl Wild Life, SD weather station (3 miles away).
1,372 jobs at 226 businesses in Day County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
16 doctors and other health care providers list an office in Grenville’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 1 |
| Nurse practitioners and physician assistants | 4 |
| Mental health providers | 1 |
| Physical and occupational therapists | 5 |
| Chiropractors | 2 |
| Pharmacies | 2 |
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.
Public schools here are run by Webster Area School District 18-5. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Webster Area Elementary - 03Webster | Pre-K–5 | 274 | Public | 11.4 mi |
| Webster Area Middle School - 02Webster | 6–8 | 108 | Public | 11.4 mi |
| Webster Area High School - 01Webster | 9–12 | 164 | Public | 11.4 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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Shares ZIP codes with Webster.
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.