Oldham County, KY ZIP codes
There are 8 ZIP codes in Oldham County, KY, in 7 towns, from 40010 to 40077. The largest are 40014 (Crestwood), 40031 (La Grange) and 40059 (Prospect).
The county seat is La Grange.
- ZIP codes
- 8
- Towns
- 7
- County seat
- La Grange
- County FIPS
21185- State
- Kentucky
- Population
- 69,257
- Median household income
- $122,497
- Land area
- 187 sq mi
- Area code
- 502
- Metro area
- Louisville/Jefferson County
Oldham County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Oldham County ZIP codes
The ZIP codes of Oldham County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Oldham County in numbers
About 69,257 people live in Oldham County, in 23,025 households, the 12th most populous of Kentucky's 120 counties. The median household income is $122,497 a year, 92% above the Kentucky median of $63,726 (US: $80,734). The median owner-occupied home is valued at $393,100 (91% above the Kentucky median), and median gross rent is $1,219 a month. The median age is 39.9; 46.4% of adults 25 and over hold a bachelor's degree or higher (27.6% across Kentucky); the average commute takes 26 minutes.
| Population | 69,257 |
|---|---|
| Households | 23,025 |
| Median age | 39.9 |
| Median household income | $122,497 |
| Median home value | $393,100 |
| Median gross rent | $1,219 |
| Bachelor's degree or higher | 46.4% |
| Mean commute | 26.2 min |
| Population density | 370 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Oldham County
| Town | ZIP codes | Population |
|---|---|---|
| La Grange | 2 | 10,311 |
| Crestwood | 1 | 6,356 |
| Prospect | 1 | 4,542 |
| Buckner | 1 | 4,119 |
| Pewee Valley | 1 | 1,483 |
| Goshen | 1 | 989 |
| Westport | 1 | 275 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Oldham County.
Not sure you are in Oldham County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Oldham County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
40010 | Buckner , KY | Standard | 678 | $196,125 | $591,500 |
40014 | Crestwood , KY | Standard | 23,101 | $121,189 | $393,700 |
40026 | Goshen , KY | Standard | 5,975 | $134,254 | $432,100 |
40031 | La Grange , KY | Standard | 26,259 | $98,513 | $341,000 |
40032 | La Grange , KY | No street area | — | — | — |
40056 | Pewee Valley , KY | Standard | 3,441 | $134,115 | $339,900 |
40059 | Prospect , KY | Standard | 20,892 | $152,727 | $559,300 |
40077 | Westport , KY | Standard | 678 | $73,333 | $196,400 |
Cite this page
zipcodes.pro. “Oldham County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ky/county/oldham
Underlying data is public domain or openly licensed — sources, vintages and licences.