County ZIP codes · Michigan · FIPS 26045
Eaton County, MI ZIP Codes
Eaton County, Michigan has 20 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 19 residential and 1 for PO boxes or a single organization. 11 of the residential ones lie mainly in Eaton County and 8 mainly in a neighboring county; 16 cross the county line. Median household income ranges from $56,631 in 48911 (Lansing) to $107,440 in 48821 (Dimondale) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Eaton 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 $69,531 and $82,959.
They carry 17 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 19 residential ZIP codes in Eaton County
11 ZIP codes lie mainly in Eaton County; 8 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 48917 | Lansing | 32,483 | 1,355 | $71k | $223k | 87% |
| 48813 | Charlotte | 20,564 | 122 | $80k | $193k | 100% |
| 48837 | Grand Ledge | 19,947 | 254 | $97k | $253k | 72% |
| 48827 | Eaton Rapids | 15,831 | 139 | $78k | $218k | 82% |
| 48821 | Dimondale | 6,327 | 318 | $107k | $244k | 96% |
| 49021 | Bellevue | 6,319 | 67 | $83k | $184k | 46% |
| 48876 | Potterville | 4,360 | 323 | $75k | $187k | 100% |
| 49076 | Olivet | 4,294 | 75 | $74k | $201k | 54% |
| 49096 | Vermontville | 3,305 | 52 | $74k | $189k | 100% |
| 48890 | Sunfield | 2,055 | 65 | $79k | $176k | 53% |
| 48861 | Mulliken | 1,774 | 68 | $89k | $185k | 92% |
Partly in Eaton County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 48911 | Lansing | 39,876 | 2,300 | $57k | $147k | 20% |
| 49073 | Nashville | 5,120 | 73 | $68k | $179k | 15% |
| 49284 | Springport | 2,493 | 47 | $58k | $153k | 7% |
| 48906 | Lansing | 25,901 | 796 | $64k | $140k | 5% |
| 48849 | Lake Odessa | 5,723 | 68 | $80k | $224k | 5% |
| 48897 | Woodland | 1,669 | 51 | $70k | $225k | 2% |
| 49264 | Onondaga | 1,454 | 54 | $92k | $236k | 2% |
| 48842 | Holt | 21,945 | 1,275 | $88k | $226k | 2% |
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?
16 ZIP codes of Eaton County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Eaton | Elsewhere |
|---|---|---|
| 48911 | 20% | Ingham County80% |
| 48917 | 87% | Ingham County13% |
| 48906 | 5% | Clinton County78%; Ingham County17% |
| 48842 | 2% | Ingham County98% |
| 48837 | 72% | Clinton County24%; Ionia County4% |
| 48827 | 82% | Ingham County16%; Jackson County2% |
| 48821 | 96% | Ingham County4% |
| 49021 | 46% | Barry County39%; Calhoun County15% |
| 48849 | 5% | Ionia County78%; Barry County18% |
| 49073 | 15% | Barry County85% |
| 49076 | 54% | Calhoun County46% |
| 49284 | 7% | Jackson County63%; Calhoun County30% |
| 48890 | 53% | Ionia County47% |
| 48861 | 92% | Ionia County8% |
| 48897 | 2% | Barry County98% |
| 49264 | 2% | Ingham County72%; Jackson County26% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 48908 | Lansing |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Eaton County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Eaton County's ZIP codes use 4 prefixes: 488, 489, 490 and 492.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 488 | Lansing, MI (SCF 488) | 10 | 88 |
| 489 | Lansing, MI (SCF 488) | 4 | 22 |
| 490 | Grand Rapids, MI (SCF 493) | 4 | 92 |
| 492 | Detroit, MI (SCF 481) | 2 | 62 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.