| ZIP Codes: | 17 ZIP Codes (10 Standard, 7 PO Box, 0 Unique) [See All] |
| Area Code: | 765 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:53:27 PM |
| Population: | 189,059 [See All] |
| FIPS: | 18157 |
| CBSA: | Lafayette-West Lafayette, IN |
| Land Area: | 507 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 40.3967, -86.8772 |
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189,059 residents live across 17 ZIPs covering 507 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 177,914 to 189,059 from 2014 to 2024 — a +6.3% change. 8 ZIPs gained residents, 4 lost (and 1 held flat).
The county's wealthiest ZIP 47992 (Westpoint, $125,526 median) and poorest ZIP 47901 (Lafayette, $47,206) are 10.5 miles apart — a 2.7× income gap across local geography.
Median home values vary 2.4× across this county — from $133,100 in 47904 (Lafayette) to $323,200 in 47906 (West Lafayette).
Density varies 188× across the county — from 40 people/sq mi in 47930 (Clarks Hill) to 7,426 in 47901 (Lafayette).
Most of the decade's growth concentrated around Lafayette — top growth ZIPs averaged +16.4% over the past ten years ( 47901 , 47909 and 47906 ).
Educational attainment ranges from 20.2% bachelor's+ in 47904 (Lafayette) to 63.9% in 47906 (West Lafayette) — the breadth of educational profiles across the area.
Within Indiana, this is the #7 most populous of 92 counties and ranks #48 for median household income with the #12 fastest decade growth .
Weighted by population, the typical household earns about $60,559 across the county — reflecting what a typical resident sees, not a simple ZIP average.
40.6% of adults age 25+ hold a bachelor's degree or higher (42,873 of 105,650 reporting).
10 Standard delivery, 7 PO Box only, 0 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 47906 | West Lafayette | Standard | 75,198 | $53,103 | 132.5 | 8.2% |
| 47909 | Lafayette | Standard | 43,561 | $68,035 | 119.2 | 8.9% |
| 47905 | Lafayette | Standard | 42,219 | $65,861 | 120.1 | 2.9% |
| 47904 | Lafayette | Standard | 16,257 | $51,687 | 5.9 | 0.4% |
| 47901 | Lafayette | Standard | 4,585 | $47,206 | 0.6 | 32.1% |
| 47920 | Battle Ground | Standard | 2,329 | $90,441 | 28.0 | 6.5% |
| 47992 | Westpoint | Standard | 1,663 | $125,526 | 36.7 | 0.4% |
| 47941 | Dayton | PO Box | 1,159 | $78,553 | 1.2 | -16.4% |
| 47930 | Clarks Hill | Standard | 1,049 | $60,719 | 26.5 | -13.2% |
| 47981 | Romney | Standard | 707 | $86,023 | 35.1 | -14.4% |
| 47983 | Stockwell | PO Box | 255 | $60,756 | 0.0 | 0.4% |
| 47924 | Buck Creek | PO Box | 77 | — | 0.2 | -57.0% |
| 47907 | West Lafayette | Standard | 0 | — | 1.2 | — |
| 47902 | Lafayette | PO Box | — | — | 0.0 | — |
| 47903 | Lafayette | PO Box | — | — | 0.0 | — |
| 47996 | West Lafayette | PO Box | — | — | 0.0 | — |
| 47962 | Montmorenci | PO Box | — | — | 0.0 | — |