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

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zipcodes.pro — STATE/MI/COUNTY/ST-CLAIR

St. Clair County, MI ZIP codes

There are 23 ZIP codes in St. Clair County, MI, in 22 towns, from 48001 to 48097. The largest are 48060 (Port Huron), 48059 (Fort Gratiot) and 48079 (Saint Clair).

The county seat is Port Huron.

ZIP codes
23
Towns
22
County seat
Port Huron
County FIPS
26147
Population
160,221
Median household income
$71,270
Land area
722 sq mi
Area code
810

St. Clair County ZIP codes by town

Port Huron (county seat)
48060, 48061

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of St. Clair County ZIP codes

4800148002480044800648014480224802348027480284803248039480404804148049480544805948060480614806348064480744807948097

The ZIP codes of St. Clair County, 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.

St. Clair County in numbers

About 160,221 people live in St. Clair County, in 67,816 households, the 13th most populous of Michigan's 83 counties. The median household income is $71,270 a year, about the same as the Michigan median of $72,875 (US: $80,734). The median owner-occupied home is valued at $224,600 (3% below the Michigan median), and median gross rent is $1,029 a month. The median age is 44.5; 20.3% of adults 25 and over hold a bachelor's degree or higher (32.4% across Michigan); the average commute takes 29 minutes.

Population160,221St. Clair160,221
Households67,816St. Clair67,816
Median age44.5St. Clair44.5Michigan40.2US 38.9
Median household income$71,270St. Clair$71,270Michigan$72,875US $80,734
Median home value$224,600St. Clair$224,600Michigan$231,600US $332,700
Median gross rent$1,029St. Clair$1,029Michigan$1,129US $1,413
Bachelor's degree or higher20.3%St. Clair20.3%Michigan32.4%US 35.7%
Mean commute28.5 minSt. Clair28.5 minMichigan24.2 minUS 26.4 min
Population density222 / sq miSt. Clair222 / sq mi

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

Largest towns in St. Clair County

Largest towns in St. Clair County
TownZIP codesPopulation
Port Huron 2 28,620
Fort Gratiot 1 15,499
Marysville 1 9,925
Smiths Creek 1 9,624
East China 1 7,188
St. Clair 1 5,585
North Street 1 5,468
Fair Haven 1 5,031
Columbus 1 4,206
Casco 1 4,180
Algonac 1 4,139
Marine City 1 4,028
Avoca 1 3,889
Goodells 1 3,187
Allenton 1 3,120

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with St. Clair County.

Not sure you are in St. Clair County? What county am I in? answers from your location, near a county line included.

Every ZIP code in St. Clair County, with figures

ZIP codes in St. Clair County
ZIP City Type Population Median income Median home
48001 Algonac , MI Standard 11,224 $69,160 $257,400
48002 Allenton , MI Standard 3,120 $93,948 $313,100
48004 Anchorville , MI No street area — — —
48006 Avoca , MI Standard 3,889 $71,385 $240,200
48014 Capac , MI Standard 4,294 $66,800 $217,900
48022 Emmett , MI Standard 2,530 $96,809 $239,800
48023 Fair Haven , MI Standard 5,031 $70,469 $244,200
48027 Goodells , MI Standard 3,187 $90,417 $273,700
48028 Harsens Island , MI Standard 1,272 $109,730 $390,800
48032 Jeddo , MI Standard 1,871 $96,875 $263,900
48039 Marine City , MI Standard 7,437 $82,755 $181,300
48040 Marysville , MI Standard 9,925 $66,901 $208,600
48041 Memphis , MI Standard 4,302 $75,677 $316,500
48049 North Street , MI Standard 5,468 $84,028 $235,700
48054 East China , MI Standard 7,188 $83,241 $301,400
48059 Fort Gratiot , MI Standard 15,499 $80,062 $221,700
48060 Port Huron , MI Standard 39,342 $53,018 $160,900
48061 Port Huron , MI No street area — — —
48063 Columbus , MI Standard 4,206 $93,844 $323,200
48064 Casco , MI Standard 4,180 $87,538 $303,200
48074 Smiths Creek , MI Standard 9,624 $71,047 $197,500
48079 Saint Clair , MI Standard 12,711 $79,891 $293,000
48097 Yale , MI Standard 5,418 $63,659 $198,700

Cite this page

zipcodes.pro. “St. Clair County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mi/county/st-clair

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