Sumner is a township in Gratiot County, Michigan, home to about 1,858 people across 36 square miles. Its ZIP code is 48889, and parts of 48801, 48832 and 48877 are in Sumner too.
Homes sold for a median of $55 per square foot in the three months ending August 2026, a seller’s market.
Mostly Sumner; also New Haven Township (Gratiot County)
Mostly Alma; part is in Sumner
Mostly Seville; part is in Sumner
Mostly Richland Township (Montcalm County); part is in Sumner
Each card is that ZIP code’s whole market, including any part outside Sumner. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Gerald R. Ford International Airport (GRR)50 miles away |
|---|---|
| Closer regional airport | MBS International Airport (MBS)37 miles away |
| Nearest city of 250,000+ | Detroit, MI108 miles away |
| Nearest city of 1 million+ | Chicago, IL182 miles away |
Straight-line distances from the center of Sumner; 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.
Sumner had 1,863 residents in the 2020 census, down 3% since 2000.
It’s the 859th largest of 1,531 towns in Michigan by population.
Gratiot County grew from 29,889 residents in 1900 to 41,761 in 2020.
Gratiot 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 15°F. About 34.5 inches of rain and melted snow fall in a typical year, with about 39 inches of snow.
Source: NOAA 1991–2020 climate normals, Alma, MI weather station (7 miles away).
10,633 jobs at 725 businesses in Gratiot 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 Sumner.
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.
Parks (3 nearby)
Grocery stores
Pharmacies
Libraries (1 nearby)
Counts are within about 4 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
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Shares ZIP codes with Alma, Pine River, Seville, Arcada, Richland Township (Montcalm County), New Haven Township (Gratiot County), Ferris, Emerson, Fremont Township (Isabella County) and Lincoln Township (Isabella County).
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.