Oldham County, Kentucky
Oldham County, Kentucky, has 70,986 residents (July 2025 estimate). Its county seat is La Grange. It uses Eastern Time and covers 187 sq mi (485 km²) of land.
- Resident population, July 2025
- 70,986
- Land area
- 187 sq mi (485 km²)
- County seat or government
- La Grange
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $122,497 ± $5,474
- Median home value
- $393,100 ± $9,834
- Median rent, with utilities
- $1,219 ± $83
- Homes lived in by their owners
- 87.1% ± 1.3 points
- County type
- County
- Metro or micro area
- Louisville/Jefferson County, KY-IN metro areaCentral county
- Water area
- 9.05 sq mi (23.4 km²)
- State
- Kentucky
- County code (FIPS)
- 21185
- Coordinates (central point)
- 38.400127, -85.456150
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Oldham County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Eastern TimeAmerica/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 4024539,835 people
- 4024130,696 people
- 4003126,259 people
- 4001423,101 people
- 4005920,892 people
- 400265,975 people
- 400563,441 people
- 400682,570 people
- 400551,942 people
- 40010678 people
- 40077678 people
11 ZIP Code areas overlap Oldham County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Oldham County, largest first
- Oldham County School District69,257 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- La Grange, Kentucky (city)10,311 people
- Crestwood, Kentucky (city)6,356 people
- Prospect, Kentucky (city)4,542 people
- Buckner, Kentucky (CDP)4,119 people
- Orchard Grass Hills, Kentucky (city)1,912 people
- Pewee Valley, Kentucky (city)1,483 people
- Goshen, Kentucky (city)989 people
- River Bluff, Kentucky (city)445 people
- Westport, Kentucky (CDP)275 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Clark County, Indiana15 mi west
- Trimble County, Kentucky16 mi north
- Shelby County, Kentucky17 mi southeast
- Jefferson County, Kentucky18 mi southwest
- Henry County, Kentucky19 mi east
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.