County GIS · State lines · October 20, 2026
Arkansas–Louisiana Border Counties and Their Parcel Maps
All 14 counties and parishes on the Arkansas–Louisiana line, with seats, populations and each official parcel map, plus what changes at the line.
Looking for the counties on the Arkansas–Louisiana border and their parcel maps? According to the Census Bureau's county adjacency file, 6 Arkansas counties touch 8 Louisiana parishes along the line. Louisiana calls its counties parishes, and the Census Bureau counts them as county equivalents. Each one keeps its own property records and its own parcel viewer, so land near the line often means checking a parish and a county in two states.
Below you will find every parish and county on both sides of the line, who borders whom, and what changes when you cross from one records office to the other.
Arkansas–Louisiana border at a glance
- Parishes and counties on the line: 14 (8 parishes in Louisiana, 6 counties in Arkansas)
- With a verified public parcel viewer in our directory: 8 of 14
- Residents, 2023 estimates: about 135,857 on the Arkansas side and 465,846 on the Louisiana side
- Most populous on each side: Miller County, AR (42,415) and Caddo Parish, LA (226,386)
- Largest by land area: Union County, AR (1,039 sq mi) and Caddo Parish, LA (879 sq mi)
Arkansas counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Ashley County | Hamburg | 925 | 18,262 | ArcGIS Map Viewer |
| Chicot County | Lake Village | 637 | 9,538 | ArcGIS Map Viewer |
| Columbia County | Magnolia | 766 | 22,150 | ArcGIS Map Viewer |
| Lafayette County | Lewisville | 529 | 6,095 | ArcGIS Map Viewer |
| Miller County | Texarkana | 624 | 42,415 | ArcGIS Map Viewer |
| Union County | El Dorado | 1,039 | 37,397 | ArcGIS Map Viewer |
Louisiana parishes on the line
| Parish | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Bossier Parish | Benton | 840 | 129,795 | GeoPortal Maps |
| Caddo Parish | Shreveport | 879 | 226,386 | no verified public viewer listed yet |
| Claiborne Parish | Homer | 755 | 13,670 | no verified public viewer listed yet |
| East Carroll Parish | Lake Providence | 421 | 6,829 | no verified public viewer listed yet |
| Morehouse Parish | Bastrop | 795 | 23,955 | no verified public viewer listed yet |
| Union Parish | Farmerville | 877 | 20,650 | no verified public viewer listed yet |
| Webster Parish | Minden | 593 | 35,238 | GeoPortal Maps |
| West Carroll Parish | Oak Grove | 360 | 9,323 | no verified public viewer listed yet |
Which parishes and counties face each other
Here is who borders whom across the line, based on the Census Bureau adjacency file:
- Ashley County, AR borders Morehouse Parish, LA, Union Parish, LA
- Chicot County, AR borders East Carroll Parish, LA, Morehouse Parish, LA, West Carroll Parish, LA
- Columbia County, AR borders Claiborne Parish, LA, Webster Parish, LA
- Lafayette County, AR borders Bossier Parish, LA, Webster Parish, LA
- Miller County, AR borders Bossier Parish, LA, Caddo Parish, LA
- Union County, AR borders Claiborne Parish, LA, Morehouse Parish, LA, Union Parish, LA
What changes when you cross the line
- Different viewers. On the Arkansas side the official maps run on: ArcGIS Map Viewer (6). On the Louisiana side: no verified public viewer listed yet (6); GeoPortal Maps (2). 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 parish or county where the parcel sits. In Louisiana the parish clerk of court records deeds and the parish assessor keeps the tax rolls.
- Different rules. Zoning, septic permits and property tax are set locally and by each state, so check with the parish or county on the side where you plan to build or buy.
Researching a tract that crosses the line
- Find the parcel in both the parish and the county viewer. Each side will show only its own piece, with its own parcel number.
- Pull the recorded deed from each side's recording office (in Louisiana, the parish clerk of court), since each one records only the land inside its own boundary.
- Expect two tax bills, one from each side, 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 parish or county it falls in, along with flood zone, elevation, soil and wetlands, and links to that county's parcel map.
Related guides
More: Arkansas counties · Louisiana parishes
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.