St. Clair City is a city in St. Clair County, Michigan, home to about 5,585 people across 2.9 square miles. It has no ZIP code of its own: it’s part of 48079.
Homes sold for a median of $179 per square foot in the three months ending August 2026, a seller’s market.
Mostly St. Clair Township; part is in St. Clair City
Each card is that ZIP code’s whole market, including any part outside St. Clair City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up St. Clair City’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Detroit Metropolitan Wayne County Airport (DTW)60 miles away |
|---|---|
| Nearest city of 250,000+ | Detroit, MI43 miles away |
| Nearest city of 1 million+ | Chicago, IL273 miles away |
Straight-line distances from the center of St. Clair City; 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.
St. Clair City had 5,464 residents in the 2020 census, down 6% since 2000.
It’s the 333rd 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 81°F in summer, and winter lows average 20°F. About 34.9 inches of rain and melted snow fall in a typical year, with about 36 inches of snow.
Source: NOAA 1991–2020 climate normals, Port Huron, MI weather station (11 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).
49 doctors and other health care providers list an office in St. Clair City.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 9 |
| Nurse practitioners and physician assistants | 4 |
| Mental health providers | 22 |
| Physical and occupational therapists | 2 |
| Optometrists | 2 |
| Chiropractors | 6 |
| Pharmacies | 3 |
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 (1 nearby)
Pharmacies (1 nearby)
Libraries
Museums (1 nearby)
Counts are within about 1.5 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 East China School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Gearing Elementary SchoolSaint Clair | Pre-K–4 | 353 | Public | 0.6 mi |
| St Clair Middle SchoolSaint Clair | 5–8 | 614 | Public | 1.9 mi |
| St Clair High SchoolSaint Clair | 9–12 | 715 | Public | 0.1 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.
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Shares ZIP codes with St. Clair Township and Marysville.
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.