County GIS · State lines · October 20, 2026
New Jersey–Pennsylvania Border Counties: Parcel Maps
All 13 counties on the New Jersey–Pennsylvania line, with seats, populations and each official parcel map, plus what changes at the line.
Looking for the counties on the New Jersey–Pennsylvania border and their parcel maps? According to the Census Bureau's county adjacency file, 7 New Jersey counties touch 6 Pennsylvania 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.
Below you will find every county on both sides of the line, who borders whom, and what changes when you cross from one records office to the other.
New Jersey–Pennsylvania border at a glance
- Counties on the line: 13 (7 in New Jersey, 6 in Pennsylvania)
- With a verified public parcel viewer in our directory: 13 of 13
- Residents, 2023 estimates: about 2,074,024 on the New Jersey side and 3,319,637 on the Pennsylvania side
- Most populous on each side: Camden County, NJ (527,196) and Philadelphia County, PA (1,550,542)
- Largest by land area: Burlington County, NJ (799 sq mi) and Monroe County, PA (608 sq mi)
New Jersey counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Burlington County | Mount Holly | 799 | 469,167 | ArcGIS Experience Builder |
| Camden County | Camden | 221 | 527,196 | county web map |
| Gloucester County | Woodbury | 322 | 308,423 | ArcGIS Web AppBuilder |
| Hunterdon County | Flemington | 428 | 130,183 | ArcGIS Experience Builder |
| Mercer County | Trenton | 224 | 381,671 | county web map |
| Sussex County | Newton | 519 | 146,132 | county web map |
| Warren County | Belvidere | 357 | 111,252 | ArcGIS Experience Builder |
Pennsylvania counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Bucks County | Doylestown | 604 | 645,984 | ArcGIS Web AppBuilder |
| Delaware County | Media | 184 | 576,720 | county web map |
| Monroe County | Stroudsburg | 608 | 166,053 | county web map |
| Northampton County | Easton | 370 | 319,091 | county web map |
| Philadelphia County | Philadelphia | 134 | 1,550,542 | county web map |
| Pike County | Milford | 545 | 61,247 | county web map |
Which counties face each other
Here is who borders whom across the line, based on the Census Bureau adjacency file:
- Burlington County, NJ borders Bucks County, PA, Philadelphia County, PA
- Camden County, NJ borders Philadelphia County, PA
- Gloucester County, NJ borders Delaware County, PA, Philadelphia County, PA
- Hunterdon County, NJ borders Bucks County, PA
- Mercer County, NJ borders Bucks County, PA
- Sussex County, NJ borders Monroe County, PA, Pike County, PA
- Warren County, NJ borders Bucks County, PA, Monroe County, PA, Northampton County, PA
What changes when you cross the line
- Different viewers. On the New Jersey side the official maps run on: ArcGIS Experience Builder (3); county web map (3); ArcGIS Web AppBuilder (1). On the Pennsylvania side: county web map (5); ArcGIS Web AppBuilder (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
- New Jersey county GIS websites by viewer
- Pennsylvania county GIS websites by viewer
- Pennsylvania plat maps
More: New Jersey counties · Pennsylvania 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.