County GIS · State lines · October 20, 2026
Kentucky–Ohio Border Counties: Parcel Maps on Both Sides
All 15 counties on the Kentucky–Ohio line, with seats, 2023 populations and a link to each official parcel map, plus what changes at the state line.
Looking for the counties on the Kentucky–Ohio border and their parcel maps? According to the Census Bureau's county adjacency file, 9 Kentucky counties touch 6 Ohio counties along the line. Each one keeps its own property records and its own parcel viewer, so land near the line often means checking two counties in two states.
A farm, hunting tract or lake lot can sit in one state while the road, the neighbors or the rest of the property are in the other. This page lists every county that touches the line on either side, with links to each official parcel map.
Kentucky–Ohio border at a glance
- Counties on the line: 15 (9 in Kentucky, 6 in Ohio)
- With a verified public parcel viewer in our directory: 14 of 15
- Residents, 2023 estimates: about 541,616 on the Kentucky side and 1,238,415 on the Ohio side
- Most populous on each side: Kenton County, KY (171,321) and Hamilton County, OH (827,058)
- Largest by land area: Lewis County, KY (483 sq mi) and Scioto County, OH (610 sq mi)
Kentucky counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Boone County | Burlington | 246 | 140,496 | ArcGIS Web AppBuilder |
| Boyd County | Catlettsburg | 160 | 47,826 | qPublic (Schneider Geospatial) |
| Bracken County | Brooksville | 203 | 8,426 | qPublic (Schneider Geospatial) |
| Campbell County | Alexandria, Newport | 151 | 93,702 | county web map |
| Greenup County | Greenup | 344 | 35,221 | no verified public viewer listed yet |
| Kenton County | Covington, Independence | 160 | 171,321 | county web map |
| Lewis County | Vanceburg | 483 | 12,973 | qPublic (Schneider Geospatial) |
| Mason County | Maysville | 240 | 16,841 | qPublic (Schneider Geospatial) |
| Pendleton County | Falmouth | 277 | 14,810 | qPublic (Schneider Geospatial) |
Ohio counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Adams County | West Union | 584 | 27,521 | Beacon (Schneider Geospatial) |
| Brown County | Georgetown | 490 | 43,777 | county web map |
| Clermont County | Batavia | 453 | 211,972 | ArcGIS Web AppBuilder |
| Hamilton County | Cincinnati | 405 | 827,058 | ArcGIS Experience Builder |
| Lawrence County | Ironton | 453 | 56,118 | county web map |
| Scioto County | Portsmouth | 610 | 71,969 | Ohio Statewide Parcels layer in ArcGIS Map Viewer |
Which counties face each other
Here is who borders whom across the line, based on the Census Bureau adjacency file:
- Boone County, KY borders Hamilton County, OH
- Boyd County, KY borders Lawrence County, OH
- Bracken County, KY borders Brown County, OH, Clermont County, OH
- Campbell County, KY borders Clermont County, OH, Hamilton County, OH
- Greenup County, KY borders Lawrence County, OH, Scioto County, OH
- Kenton County, KY borders Hamilton County, OH
- Lewis County, KY borders Adams County, OH, Scioto County, OH
- Mason County, KY borders Adams County, OH, Brown County, OH
- Pendleton County, KY borders Clermont County, OH
What changes when you cross the line
- Different viewers. On the Kentucky side the official maps run on: qPublic (Schneider Geospatial) (5); county web map (2); ArcGIS Web AppBuilder (1); no verified public viewer listed yet (1). On the Ohio side: county web map (2); Beacon (Schneider Geospatial) (1); ArcGIS Web AppBuilder (1); ArcGIS Experience Builder (1); Ohio Statewide Parcels layer in ArcGIS Map Viewer (1). Search boxes, parcel ID formats and the details shown in pop-ups will differ.
- Different records offices. Deeds, plats and tax bills are kept by the county where the parcel sits.
- Different rules. Zoning, septic permits and property tax are set locally and by each state, so check with the county on the side where you plan to build or buy.
Researching a tract that crosses the line
- Find the parcel in both counties' viewers. Each side will show only its own piece, with its own parcel number.
- Pull the recorded deed from each county's register or recorder, since each county records only the land inside its own boundary.
- Expect two tax bills, one from each county, and check each state's rules for homestead or farm exemptions.
- For a sale, a fence or a building permit, hire a licensed surveyor familiar with the line; tax-map lines are drawings, not surveys.
A quick way to check which side a spot is on
Open the Platbookmapper Land Map, search the nearest county, and tap the spot. The land report shows which county it falls in, along with flood zone, elevation, soil and wetlands, and links to that county's parcel map.
Related guides
More: Kentucky counties · Ohio counties
Sources
- U.S. Census Bureau county adjacency file, used for which counties share the line.
- U.S. Census Bureau Gazetteer files, 2020 county land area.
- U.S. Census Bureau, Population Estimates Program, county totals, Vintage 2023 (July 1, 2023 estimates)
- Platbookmapper county GIS directory (live data file behind our county pages, pulled October 20, 2026) for each county's official parcel viewer.
- County seats: Wikidata (county seat property), cross-checked against Census place names.