| ZIP Codes: | 12 ZIP Codes (11 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 269 / 517 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:31 PM |
| Population: | 117,259 [See All] |
| FIPS: | 26045 |
| CBSA: | Lansing-East Lansing, MI |
| Land Area: | 691 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 42.6336, -84.8186 |
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117,259 residents live across 12 ZIPs covering 691 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 115,805 to 117,259 from 2014 to 2024 — a +1.3% change. 8 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 48821 (Dimondale, $107,440 median) and poorest ZIP 48917 (Lansing, $70,990) are 5.4 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.4× across this county — from $175,800 in 48890 (Sunfield) to $253,200 in 48837 (Grand Ledge).
Density varies 25× across the county — from 52 people/sq mi in 49096 (Vermontville) to 1,322 in 48917 (Lansing).
Educational attainment ranges from 13.5% bachelor's+ in 49021 (Bellevue) to 40.7% in 48837 (Grand Ledge) — the breadth of educational profiles across the area.
Within Michigan, this is the #18 most populous of 83 counties and ranks #12 for median household income .
Weighted by population, the typical household earns about $81,351 across the county — reflecting what a typical resident sees, not a simple ZIP average.
30.4% of adults age 25+ hold a bachelor's degree or higher (25,546 of 84,076 reporting).
11 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 48917 | Lansing | Standard | 32,483 | $70,990 | 24.6 | 1.1% |
| 48813 | Charlotte | Standard | 20,564 | $80,429 | 164.9 | -2.9% |
| 48837 | Grand Ledge | Standard | 19,947 | $96,517 | 78.9 | 4.6% |
| 48827 | Eaton Rapids | Standard | 15,831 | $78,257 | 113.9 | -2.0% |
| 48821 | Dimondale | Standard | 6,327 | $107,440 | 21.7 | 9.3% |
| 49021 | Bellevue | Standard | 6,319 | $82,959 | 94.5 | 0.4% |
| 48876 | Potterville | Standard | 4,360 | $74,594 | 15.2 | 9.2% |
| 49076 | Olivet | Standard | 4,294 | $74,440 | 57.6 | 1.2% |
| 49096 | Vermontville | Standard | 3,305 | $73,929 | 63.1 | 7.1% |
| 48890 | Sunfield | Standard | 2,055 | $79,444 | 30.6 | -2.0% |
| 48861 | Mulliken | Standard | 1,774 | $89,412 | 26.2 | 0.6% |
| 48908 | Lansing | PO Box | — | — | 0.0 | — |