Marine City is a city in St. Clair County, Michigan, home to about 4,028 people across 2.2 square miles. Its ZIP code is 48039.
Homes sold for a median of $172 per square foot in the three months ending August 2026, a seller’s market.
Mostly Marine City; also Cottrellville
Each card is that ZIP code’s whole market, including any part outside Marine City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Marine City’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Marine City well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Detroit Metropolitan Wayne County Airport (DTW)52 miles away |
|---|---|
| Nearest city of 250,000+ | Detroit, MI35 miles away |
| Nearest city of 1 million+ | Chicago, IL269 miles away |
Straight-line distances from the center of Marine 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.
Marine City had 4,079 residents in the 2020 census, down 12% since 2000.
It’s the 444th 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 (5 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).
45 doctors and other health care providers list an office in Marine City.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 13 |
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 15 |
| Physical and occupational therapists | 7 |
| Chiropractors | 5 |
| Pharmacies | 5 |
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 (1 nearby)
Grocery stores
Pharmacies
Libraries
Museums
Theaters and performance venues
Counts are within about 1 mile 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 |
|---|---|---|---|---|
| Belle River Elementary SchoolMarine City | K–5 | 343 | Public | 2.5 mi |
| Marine City Middle SchoolMarine City | 6–8 | 330 | Public | 2.9 mi |
| Marine City High SchoolMarine City | 9–12 | 437 | Public | 3.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Cardinal Mooney CatholicMarine City | 9–12 | 168 | Roman Catholic | 3.3 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Cottrellville.
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.