| ZIP Codes: | 8 ZIP Codes (5 Standard, 2 PO Box, 1 Unique) [See All] |
| Area Code: | 989 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:32 PM |
| Population: | 62,316 [See All] |
| FIPS: | 26073 |
| CBSA: | Mount Pleasant, MI |
| Land Area: | 463 sq mi |
| Water Area: | 5 sq mi |
| Coordinates: | 43.5995, -84.8339 |
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62,316 residents live across 8 ZIPs covering 463 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 67,492 to 60,088 from 2014 to 2024 — a -11.0% change. 2 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 48893 (Weidman, $73,108 median) and poorest ZIP 48858 (Mount Pleasant, $51,267) are 12.6 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.2× across this county — from $150,300 in 48878 (Rosebush) to $180,000 in 48893 (Weidman).
Density varies 300× across the county — from 37 people/sq mi in 49310 (Blanchard) to 11,101 in 48859 (Mount Pleasant).
Educational attainment ranges from 17.0% bachelor's+ in 48878 (Rosebush) to 36.7% in 48858 (Mount Pleasant) — the breadth of educational profiles across the area.
Within Michigan, this is the #31 most populous of 83 counties and ranks #24 for median household income .
Hosts 1 single-entity Unique ZIP: 48859Central Michigan University .
Weighted by population, the typical household earns about $56,261 across the county — reflecting what a typical resident sees, not a simple ZIP average.
32.2% of adults age 25+ hold a bachelor's degree or higher (11,184 of 34,768 reporting). The most-educated ZIPs cluster around Mount Pleasant.
5 Standard delivery, 2 PO Box only, 1 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
Isabella County lost 7.7% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 48858 | Mount Pleasant | Standard | 42,226 | $51,267 | 177.4 | -15.0% |
| 48883 | Shepherd | Standard | 7,292 | $65,223 | 116.0 | -2.1% |
| 48893 | Weidman | Standard | 5,921 | $73,108 | 51.5 | 11.0% |
| 49310 | Blanchard | Standard | 3,183 | $64,420 | 86.0 | -1.6% |
| 48859 | Mount Pleasant | Unique | 2,228 | — | 0.2 | — |
| 48878 | Rosebush | Standard | 1,240 | $57,656 | 32.0 | -22.1% |
| 48896 | Winn | PO Box | 226 | $136,136 | 0.0 | 7.6% |
| 48804 | Mount Pleasant | PO Box | — | — | 0.0 | — |