Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/MI/ST-CLAIR

St. Clair ZIP code, Michigan

The ZIP code for St. Clair, MI is 48079, and its area code is 810.

USPS city name
1 ZIP code
Population
5,585
Area code
810

Also written Saint Clair, the spelling the Postal Service uses.

St. Clair in numbers

About 5,585 people live in St. Clair, in 2,404 households. The median household income is $69,688 a year, 4% below the Michigan median of $72,875 (US: $80,734). The median owner-occupied home is valued at $223,200 (4% below the Michigan median), and median gross rent is $1,113 a month. The median age is 42.0; 27.4% of adults 25 and over hold a bachelor's degree or higher (32.4% across Michigan); the average commute takes 22 minutes.

Population5,585St. Clair5,585
Households2,404St. Clair2,404
Median age42.0St. Clair42.0Michigan40.2US 38.9
Median household income$69,688St. Clair$69,688Michigan$72,875US $80,734
Median home value$223,200St. Clair$223,200Michigan$231,600US $332,700
Median gross rent$1,113St. Clair$1,113Michigan$1,129US $1,413
Bachelor's degree or higher27.4%St. Clair27.4%Michigan32.4%US 35.7%
Mean commute22.0 minSt. Clair22.0 minMichigan24.2 minUS 26.4 min
Population density1,900 / sq miSt. Clair1,900 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place St. Clair city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Saint Clair

ZIP codes with the USPS city name Saint Clair
ZIP City Type Population Median income Median home
48079 Saint Clair , MI Standard 12,711 $79,891 $293,000

Map of St. Clair ZIP codes

48079

The ZIP codes of St. Clair, MI, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near St. Clair

The nearest larger towns are Marysville (9,925 people, 5.7 mi), Port Huron (28,620 people, 12 mi) and Richmond (5,855 people, 13 mi).

Towns near St. Clair
TownPopulationDistance
Marysville 9,925 5.7 mi
Marine City 4,028 7.8 mi
Port Huron 28,620 11.9 mi
Richmond 5,855 13.2 mi
Pearl Beach 4,506 14.3 mi
Algonac 4,139 14.4 mi
New Baltimore 12,072 15.8 mi
New Haven 6,475 16.8 mi
Mount Clemens 15,511 25.3 mi
Romeo 3,578 25.9 mi
Almont 2,838 28.7 mi

More nearby: every ZIP code in St. Clair County · Michigan ZIP codes

Cite this page

zipcodes.pro. “St. Clair, MI ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mi/st-clair

Underlying data is public domain or openly licensed — sources, vintages and licences.