County GIS · State lines · October 20, 2026
Oklahoma–Texas Border Counties: Parcel Maps on Both Sides
All 36 counties on the Oklahoma–Texas 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 Oklahoma–Texas border and their parcel maps? According to the Census Bureau's county adjacency file, 16 Oklahoma counties touch 20 Texas 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.
Oklahoma–Texas border at a glance
- Counties on the line: 36 (16 in Oklahoma, 20 in Texas)
- With a verified public parcel viewer in our directory: 36 of 36
- Residents, 2023 estimates: about 221,438 on the Oklahoma side and 606,220 on the Texas side
- Most populous on each side: Bryan County, OK (48,967) and Grayson County, TX (146,907)
- Largest by land area: Texas County, OK (2,041 sq mi) and Dallam County, TX (1,503 sq mi)
Oklahoma counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Beaver County | Beaver | 1,815 | 5,018 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Beckham County | Sayre | 902 | 22,042 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Bryan County | Durant | 904 | 48,967 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Choctaw County | Hugo | 770 | 14,276 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Cimarron County | Boise City | 1,835 | 2,191 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Cotton County | Walters | 633 | 5,427 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Ellis County | Arnett | 1,231 | 3,648 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Harmon County | Hollis | 537 | 2,392 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Jackson County | Altus | 803 | 24,669 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Jefferson County | Waurika | 759 | 5,347 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Love County | Marietta | 514 | 10,296 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Marshall County | Madill | 371 | 15,970 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| McCurtain County | Idabel | 1,851 | 30,660 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Roger Mills County | Cheyenne | 1,141 | 3,295 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Texas County | Guymon | 2,041 | 20,371 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
| Tillman County | Frederick | 871 | 6,869 | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
Texas counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Bowie County | Boston | 885 | 91,687 | county web map |
| Childress County | Childress | 697 | 6,788 | appraisal district map |
| Clay County | Henrietta | 1,089 | 10,738 | appraisal district map |
| Collingsworth County | Wellington | 918 | 2,563 | appraisal district map |
| Cooke County | Gainesville | 875 | 43,782 | appraisal district map |
| Dallam County | Dalhart | 1,503 | 7,237 | appraisal district map |
| Fannin County | Bonham | 891 | 37,571 | appraisal district map |
| Grayson County | Sherman | 933 | 146,907 | appraisal district map |
| Hansford County | Spearman | 920 | 5,071 | appraisal district map |
| Hardeman County | Quanah | 695 | 3,490 | appraisal district map |
| Hemphill County | Canadian | 906 | 3,189 | appraisal district map |
| Lamar County | Paris | 907 | 51,127 | appraisal district map |
| Lipscomb County | Lipscomb | 932 | 2,906 | Prodigy CAD map |
| Montague County | Montague | 931 | 21,598 | Prodigy CAD map |
| Ochiltree County | Perryton | 918 | 9,704 | appraisal district map |
| Red River County | Clarksville | 1,044 | 11,678 | Prodigy CAD map |
| Sherman County | Stratford | 923 | 2,678 | appraisal district map |
| Wheeler County | Wheeler | 915 | 4,804 | appraisal district map |
| Wichita County | Wichita Falls | 628 | 130,180 | Prodigy CAD map |
| Wilbarger County | Vernon | 971 | 12,522 | Prodigy CAD map |
Which counties face each other
The Census adjacency file pairs counties that share a boundary. Use it to find the county across the line from the one you know:
- Beaver County, OK borders Lipscomb County, TX, Ochiltree County, TX
- Beckham County, OK borders Collingsworth County, TX, Wheeler County, TX
- Bryan County, OK borders Fannin County, TX, Grayson County, TX, Lamar County, TX
- Choctaw County, OK borders Lamar County, TX, Red River County, TX
- Cimarron County, OK borders Dallam County, TX, Sherman County, TX
- Cotton County, OK borders Clay County, TX, Wichita County, TX
- Ellis County, OK borders Hemphill County, TX, Lipscomb County, TX
- Harmon County, OK borders Childress County, TX, Collingsworth County, TX, Hardeman County, TX
- Jackson County, OK borders Hardeman County, TX, Wilbarger County, TX
- Jefferson County, OK borders Clay County, TX, Montague County, TX
- Love County, OK borders Cooke County, TX, Grayson County, TX, Montague County, TX
- Marshall County, OK borders Grayson County, TX
- McCurtain County, OK borders Bowie County, TX, Red River County, TX
- Roger Mills County, OK borders Hemphill County, TX, Wheeler County, TX
- Texas County, OK borders Hansford County, TX, Ochiltree County, TX, Sherman County, TX
- Tillman County, OK borders Wichita County, TX, Wilbarger County, TX
What changes when you cross the line
- Different viewers. On the Oklahoma side the official maps run on: OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer (16). On the Texas side: appraisal district map (14); Prodigy CAD map (5); county web map (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: Oklahoma counties · Texas 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.