Summit is a town in Grant County, South Dakota, home to about 359 people across 0.6 square miles. Its ZIP code is 57266.
Mostly Summit
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)189 miles away |
|---|---|
| Closer regional airport | Watertown Regional Airport (ATY)31 miles away |
| Nearest city of 250,000+ | Minneapolis, MN186 miles away |
| Nearest city of 1 million+ | Chicago, IL527 miles away |
Straight-line distances from the center of Summit; 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.
Summit had 288 residents in the 2020 census, up 2% since 2000.
It’s the 180th largest of 440 towns in South Dakota by population.
Grant County grew from 9,103 residents in 1900 to 7,556 in 2020.
Grant 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 2°F. About 25.9 inches of rain and melted snow fall in a typical year, with about 59 inches of snow.
Source: NOAA 1991–2020 climate normals, Summit 1 W, SD weather station (3 miles away).
3,666 jobs at 284 businesses in Grant County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Summit.
Nearest hospitals
Providers with an office here
| Mental health providers | 1 |
|---|
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 Summit School District 54-6, Watertown School District 14-4. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Summit Elementary - 02Summit | Pre-K–8 | 132 | Public | 3.3 mi |
| Sunrise Colony - 15Summit | K–8 | 20 | Public | 12.6 mi |
| Summit High School - 01Summit | 9–12 | 50 | Public | 3.3 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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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.