Algonac is a city in St. Clair County, Michigan, home to about 4,139 people across 1.4 square miles. Its ZIP code is 48001.
Homes sold for a median of $207 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Algonac. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Algonac’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)49 miles away |
|---|---|
| Nearest city of 250,000+ | Detroit, MI32 miles away |
| Nearest city of 1 million+ | Chicago, IL266 miles away |
Straight-line distances from the center of Algonac; 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.
Algonac had 4,196 residents in the 2020 census, down 9% since 2000.
It’s the 429th 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 (3 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).
39 doctors and other health care providers list an office in Algonac.
Nearest hospitals
Providers with an office here
| Primary care doctors | 9 |
|---|---|
| Dentists | 7 |
| Nurse practitioners and physician assistants | 4 |
| Mental health providers | 12 |
| Physical and occupational therapists | 3 |
| Chiropractors | 4 |
| Pharmacies | 6 |
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.
Grocery stores
Pharmacies
Libraries
Museums
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.
Established in 1805.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
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 | 2.2 mi |
| Algonquin Elementary SchoolClay | 2–6 | 445 | Public | 2.2 mi |
| Algonac Alternative EducationClay | 7–12 | 19 | Alternative Education | 0.6 mi |
| Algonac JuniorSenior High SchoolClay | 7–12 | 644 | Public | 0.7 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 Clay.
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.