| ZIP Codes: | 11 ZIP Codes (9 Standard, 1 PO Box, 1 Unique) [See All] |
| Area Code: | 989 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:31 PM |
| Population: | 99,197 [See All] |
| FIPS: | 26017 |
| CBSA: | Bay City, MI |
| Land Area: | 418 sq mi |
| Water Area: | 30 sq mi |
| Coordinates: | 43.6669, -83.9580 |
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99,197 residents live across 11 ZIPs covering 418 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 103,998 to 99,197 from 2014 to 2024 — a -4.6% change. 2 ZIPs gained residents, 7 lost (and 1 held flat).
The county's wealthiest ZIP 48634 (Linwood, $87,992 median) and poorest ZIP 48708 (Bay City, $50,518) are 17.6 miles apart — a 1.7× income gap across local geography.
Median home values vary 1.6× across this county — from $107,700 in 48708 (Bay City) to $177,100 in 48611 (Auburn).
Density varies 32× across the county — from 24 people/sq mi in 48613 (Bentley) to 789 in 48708 (Bay City).
Educational attainment ranges from 13.3% bachelor's+ in 48613 (Bentley) to 34.9% in 48611 (Auburn) — the breadth of educational profiles across the area.
Within Michigan, this is the #22 most populous of 83 counties and ranks #35 for median household income .
Hosts 1 single-entity Unique ZIP: 48710University Center .
Weighted by population, the typical household earns about $62,312 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.3% of adults age 25+ hold a bachelor's degree or higher (16,200 of 72,744 reporting).
9 Standard delivery, 1 PO Box only, 1 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 48706 | Bay City | Standard | 38,974 | $62,747 | 67.9 | -2.9% |
| 48708 | Bay City | Standard | 25,635 | $50,518 | 32.5 | -5.9% |
| 48732 | Essexville | Standard | 11,340 | $57,903 | 25.1 | 1.2% |
| 48650 | Pinconning | Standard | 6,510 | $61,911 | 95.6 | -8.6% |
| 48611 | Auburn | Standard | 6,093 | $87,963 | 38.2 | -11.0% |
| 48634 | Linwood | Standard | 4,334 | $87,992 | 49.3 | -3.5% |
| 48631 | Kawkawlin | Standard | 3,681 | $74,398 | 34.4 | -16.1% |
| 48747 | Munger | Standard | 1,549 | $81,458 | 30.6 | 7.3% |
| 48613 | Bentley | Standard | 1,081 | $58,846 | 44.4 | -1.5% |
| 48710 | University Center | Unique | 0 | — | 0.1 | — |
| 48707 | Bay City | PO Box | — | — | 0.0 | — |