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Zip Code 48059 — Fort Gratiot, MI

48059 is a ZIP Code associated with Fort Gratiot, MI, located within St. Clair. The postal region supports an estimated population of 15,499 residents across Data Pending housing units, with a population density of 188.8 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.082530, -82.499130)

Data Metric	Local Statistic
Postal / Zip Code	48059
Primary City	Fort Gratiot
State / Province	MI
County	St. Clair
Total Population	15,499
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	188.8 people/sq mi
Timezone	America/Detroit

How 48059 Compares

Metric	ZIP 48059	St. Clair County	MI State Average
Population	15,499	161,718	10,077,716
Median Income	Data Pending	N/A	N/A
Population Density	188.8 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 48049	North Street	5.0 mi	5,468	N/A
Zip 48032	Jeddo	5.9 mi	1,871	N/A
Zip 48060	Port Huron	7.4 mi	39,342	N/A
Zip 48074	Smiths Creek	9.8 mi	9,624	N/A
Zip 48006	Avoca	10.0 mi	3,889	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →