| ZIP Codes: | 7 ZIP Codes (6 Standard, 0 PO Box, 1 Unique) [See All] |
| Area Code: | 502 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:21 PM |
| Population: | 60,132 [See All] |
| FIPS: | 21185 |
| CBSA: | Louisville/Jefferson County, KY-IN |
| Land Area: | 164 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 38.3961, -85.4532 |
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60,132 residents live across 7 ZIPs covering 164 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 53,821 to 60,132 from 2014 to 2024 — a +11.7% change. 5 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 40010 (Buckner, $196,125 median) and poorest ZIP 40077 (Westport, $73,333) are 8.4 miles apart — a 2.7× income gap across local geography.
Median home values vary 3.0× across this county — from $196,400 in 40077 (Westport) to $591,500 in 40010 (Buckner).
Density varies 16× across the county — from 71 people/sq mi in 40077 (Westport) to 1,140 in 40056 (Pewee Valley).
Educational attainment ranges from 18.4% bachelor's+ in 40077 (Westport) to 64.7% in 40026 (Goshen) — the breadth of educational profiles across the area.
Within Kentucky, this is the #14 most populous of 120 counties and ranks #1 for median household income with the #11 fastest decade growth .
On the national stage, Oldham County is ranks #69 for income .
Hosts 1 single-entity Unique ZIP: 40032Ky State Reformatory .
Weighted by population, the typical household earns about $113,630 across the county — reflecting what a typical resident sees, not a simple ZIP average.
43.0% of adults age 25+ hold a bachelor's degree or higher (17,526 of 40,772 reporting).
6 Standard delivery, 0 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 40031 | La Grange | Standard | 26,259 | $98,513 | 67.2 | 12.4% |
| 40014 | Crestwood | Standard | 23,101 | $121,189 | 48.9 | 13.7% |
| 40026 | Goshen | Standard | 5,975 | $134,254 | 33.8 | 4.0% |
| 40056 | Pewee Valley | Standard | 3,441 | $134,115 | 3.0 | -2.4% |
| 40010 | Buckner | Standard | 678 | $196,125 | 1.7 | 37.0% |
| 40077 | Westport | Standard | 678 | $73,333 | 9.6 | 79.8% |
| 40032 | La Grange | Unique | — | — | 0.0 | — |