Clay is a township in St. Clair County, Michigan, home to about 8,357 people across 35 square miles. Its ZIP code is 48028, and parts of 48001 are in Clay too.
Homes sold for a median of $248 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Algonac; part is in Clay
Each card is that ZIP code’s whole market, including any part outside Clay. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Clay’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Clay well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Detroit Metropolitan Wayne County Airport (DTW)48 miles away |
|---|---|
| Nearest city of 250,000+ | Detroit, MI31 miles away |
| Nearest city of 1 million+ | Chicago, IL266 miles away |
Straight-line distances from the center of Clay; 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.
Clay had 8,446 residents in the 2020 census, down 14% since 2000.
It’s the 237th largest of 1,531 towns in Michigan by population.
St. Clair County grew from 55,228 residents in 1900 to 160,383 in 2020.
St. Clair County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 16°F. About 34.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Algonac Wwtp, MI weather station (2 miles away).
41,206 jobs at 3,080 businesses in St. Clair 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 Clay.
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 (8 nearby)
Grocery stores (2 nearby)
Pharmacies (2 nearby)
Libraries (2 nearby)
Museums (2 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.
Public schools here are run by Algonac Community School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Millside Elementary SchoolClay | Pre-K–1 | 179 | Public | 2.6 mi |
| Algonquin Elementary SchoolClay | 2–6 | 445 | Public | 2.7 mi |
| Algonac Alternative EducationClay | 7–12 | 19 | Alternative Education | 1.2 mi |
| Algonac JuniorSenior High SchoolClay | 7–12 | 644 | Public | 1.1 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.
Buying or selling around Clay? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with Algonac.
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.