Kentucky · FIPS 21111 · County seat: Louisville
Jefferson County, KY GIS & Parcel Viewer
Looking for lot lines or a parcel number in Jefferson County, KY? The quickest route is the Jefferson County parcel map, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Jefferson County parcel map ↗
Opens jeffersonpva.ky.gov in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Jefferson County parcel map |
|---|---|
| Type | County-run map |
| Website | jeffersonpva.ky.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Louisville |
| Population | 772,144 (2023 Census Bureau estimate) |
| Land area | 381 sq mi |
| FIPS code | 21111 |
Where the parcel data comes from
This map is published by or for Jefferson County itself, so it reflects the local parcel layer rather than a third-party copy. When we tested the link in October 2026 it opened with no login and no fee.
Finding a property on this map
- Press the button above to open the county's own web map.
- Search for the property or pan and zoom to it.
- Click the lot to bring up what the county publishes about it.
- Look for print or measure tools if you need a quick map or rough size.
If an address search comes up empty, try the parcel number from a tax bill or deed instead, or click the lot on the map.
About Jefferson County
Census Bureau figures put Jefferson County at about 772,144 people (2023 estimate) on roughly 381 square miles of land, which is about 2,027 residents per square mile. That makes it the most populous of Kentucky's 120 counties. Louisville serves as the county seat.
Neighboring counties
Parcels close to the edge of Jefferson County can fall in the next county over. Neighboring counties:
- Bullitt County
- Hardin County (state list)
- Oldham County
- Shelby County
- Spencer County (state list)
- Clark County, IN
- Floyd County, IN
- Harrison County, IN
Before you rely on the lines
The lines you see online are approximate. They're good for finding a lot and its parcel number, but a legal boundary question needs the recorded plat or a surveyor.