| ZIP Codes: | 23 ZIP Codes (21 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Code: | 810 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:34 PM |
| Population: | 161,718 [See All] |
| FIPS: | 26147 |
| CBSA: | Detroit-Warren-Dearborn, MI |
| Land Area: | 753 sq mi |
| Water Area: | 40 sq mi |
| Coordinates: | 42.8990, -82.6434 |
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161,718 residents live across 23 ZIPs covering 753 sq mi, served by 22 distinct USPS-recognized cities.
Population moved from 162,873 to 161,718 from 2014 to 2024 — a -0.7% change. 8 ZIPs gained residents, 13 lost.
The county's wealthiest ZIP 48028 (Harsens Island, $109,730 median) and poorest ZIP 48060 (Port Huron, $53,018) are 29.4 miles apart — a 2.1× income gap across local geography.
Median home values vary 2.4× across this county — from $160,900 in 48060 (Port Huron) to $390,800 in 48028 (Harsens Island).
Density varies 35× across the county — from 50 people/sq mi in 48032 (Jeddo) to 1,752 in 48060 (Port Huron).
Educational attainment ranges from 11.0% bachelor's+ in 48014 (Capac) to 29.9% in 48063 (Columbus) — the breadth of educational profiles across the area.
Within Michigan, this is the #14 most populous of 83 counties and ranks #15 for median household income .
Weighted by population, the typical household earns about $71,956 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.3% of adults age 25+ hold a bachelor's degree or higher (23,718 of 116,659 reporting).
21 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 48060 | Port Huron | Standard | 39,342 | $53,018 | 22.5 | -1.8% |
| 48059 | Fort Gratiot | Standard | 15,499 | $80,062 | 31.4 | 2.8% |
| 48079 | Saint Clair | Standard | 12,711 | $79,891 | 42.9 | 4.3% |
| 48001 | Algonac | Standard | 11,224 | $69,160 | 20.1 | -5.4% |
| 48040 | Marysville | Standard | 9,925 | $66,901 | 8.2 | 0.8% |
| 48074 | Smiths Creek | Standard | 9,624 | $71,047 | 37.4 | 3.9% |
| 48039 | Marine City | Standard | 7,437 | $82,755 | 24.9 | -3.6% |
| 48054 | East China | Standard | 7,188 | $83,241 | 42.0 | -1.0% |
| 48049 | North Street | Standard | 5,468 | $84,028 | 36.1 | -0.9% |
| 48097 | Yale | Standard | 5,418 | $63,659 | 77.2 | 3.1% |
| 48023 | Fair Haven | Standard | 5,031 | $70,469 | 17.0 | -0.8% |
| 48041 | Memphis | Standard | 4,302 | $75,677 | 39.8 | -5.6% |
| 48014 | Capac | Standard | 4,294 | $66,800 | 37.0 | -4.4% |
| 48063 | Columbus | Standard | 4,206 | $93,844 | 37.0 | 4.6% |
| 48064 | Casco | Standard | 4,180 | $87,538 | 37.2 | 2.7% |
| 48006 | Avoca | Standard | 3,889 | $71,385 | 72.0 | -1.0% |
| 48027 | Goodells | Standard | 3,187 | $90,417 | 37.4 | -1.2% |
| 48002 | Allenton | Standard | 3,120 | $93,948 | 37.1 | -3.9% |
| 48022 | Emmett | Standard | 2,530 | $96,809 | 35.7 | -3.4% |
| 48032 | Jeddo | Standard | 1,871 | $96,875 | 37.6 | -24.2% |
| 48028 | Harsens Island | Standard | 1,272 | $109,730 | 22.7 | 10.9% |
| 48004 | Anchorville | PO Box | — | — | 0.0 | — |
| 48061 | Port Huron | PO Box | — | — | 0.0 | — |