County ZIP codes · Michigan · FIPS 26073
Isabella County, MI ZIP Codes
Isabella County, Michigan has 17 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 16 residential and 1 for PO boxes or a single organization. 7 of the residential ones lie mainly in Isabella County and 9 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $51,267 in 48858 (Mount Pleasant) to $73,108 in 48893 (Weidman) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Isabella County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $56,804 and $63,750.
They carry 15 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 16 residential ZIP codes in Isabella County
7 ZIP codes lie mainly in Isabella County; 9 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 48858 | Mount Pleasant | 42,226 | 242 | $51k | $171k | 99% |
| 48883 | Shepherd | 7,292 | 63 | $65k | $160k | 65% |
| 48893 | Weidman | 5,921 | 116 | $73k | $180k | 100% |
| 49310 | Blanchard | 3,183 | 36 | $64k | $178k | 63% |
| 48859 | Mount Pleasant | 2,228 | 10,922 | – | – | 100% |
| 48878 | Rosebush | 1,240 | 39 | $58k | $150k | 100% |
| 48896 | Winn | 226 | 834 | $136k | $210k | 100% |
Partly in Isabella County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 48622 | Farwell | 6,345 | 74 | $57k | $137k | 36% |
| 48617 | Clare | 9,403 | 68 | $58k | $160k | 35% |
| 48632 | Lake | 5,268 | 43 | $57k | $146k | 32% |
| 49340 | Remus | 2,437 | 29 | $54k | $191k | 29% |
| 48618 | Coleman | 5,197 | 51 | $62k | $137k | 21% |
| 49305 | Barryton | 2,378 | 47 | $52k | $148k | 16% |
| 48877 | Riverdale | 1,962 | 53 | $65k | $112k | 13% |
| 48880 | Saint Louis | 9,994 | 134 | $60k | $145k | 8% |
| 48829 | Edmore | 3,652 | 54 | $64k | $152k | 4% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
12 ZIP codes of Isabella County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Isabella | Elsewhere |
|---|---|---|
| 48858 | 99% | Midland County1% |
| 48880 | 8% | Gratiot County54%; Midland County38% |
| 48617 | 35% | Clare County65% |
| 48883 | 65% | Midland County35% |
| 48622 | 36% | Clare County64% |
| 48632 | 32% | Clare County63%; Osceola County5% |
| 48618 | 21% | Midland County77%; Gladwin County2% |
| 48829 | 4% | Montcalm County96% |
| 49310 | 63% | Mecosta County35%; Montcalm County2% |
| 49340 | 29% | Mecosta County71% |
| 49305 | 16% | Mecosta County84% |
| 48877 | 13% | Gratiot County46%; Montcalm County42% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 48804 | Mount Pleasant |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Isabella County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Isabella County's ZIP codes use 3 prefixes: 486, 488 and 493.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 486 | Metroplex, MI (SCF 480) | 4 | 60 |
| 488 | Lansing, MI (SCF 488) | 10 | 88 |
| 493 | Grand Rapids, MI (SCF 493) | 3 | 49 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.