77 counties mapped. On average, 26% of Oklahoma county soil area is high shrink-swell clay (USDA SSURGO).
Higher percentages mean more of a county's mapped soil is shrink-swell clay that expands and contracts with moisture. This is county-scale exposure, not a diagnosis of any single home — but it tells you whether soil movement belongs on your radar.
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Before you call a foundation company →| County | Tier | High-risk % | Moderate % |
|---|---|---|---|
| Coal | Severe | 62% | 4% |
| Latimer | Severe | 54% | 10% |
| Kay | Severe | 54% | 27% |
| Cotton | Severe | 50% | 29% |
| Craig | Severe | 48% | 38% |
| Choctaw | Severe | 47% | 18% |
| Garfield | Severe | 47% | 27% |
| Kiowa | Severe | 46% | 32% |
| Grant | Severe | 46% | 24% |
| Pittsburg | Severe | 45% | 8% |
| Atoka | Severe | 43% | 26% |
| Muskogee | Severe | 42% | 28% |
| Haskell | Severe | 42% | 14% |
| Bryan | Severe | 42% | 30% |
| Tillman | Severe | 42% | 21% |
| Osage | Severe | 40% | 20% |
| Washington | Severe | 40% | 47% |
| Ottawa | Severe | 38% | 24% |
| Le Flore | Severe | 38% | 21% |
| McCurtain | Severe | 37% | 8% |
| Marshall | Severe | 37% | 22% |
| Nowata | Severe | 35% | 46% |
| Tulsa | Severe | 35% | 32% |
| Pawnee | Severe | 35% | 22% |
| Noble | Severe | 35% | 40% |
| Garvin | Severe | 34% | 26% |
| Rogers | Severe | 34% | 42% |
| McIntosh | Severe | 34% | 20% |
| Wagoner | Severe | 33% | 37% |
| Comanche | Severe | 30% | 36% |
| Murray | High | 30% | 40% |
| Okfuskee | High | 29% | 14% |
| Okmulgee | High | 28% | 40% |
| Mayes | High | 28% | 25% |
| Pontotoc | High | 27% | 32% |
| Pushmataha | High | 27% | 12% |
| Jackson | High | 25% | 32% |
| Lincoln | High | 24% | 15% |
| Payne | High | 24% | 21% |
| Seminole | High | 24% | 18% |
| Creek | High | 23% | 16% |
| Carter | High | 23% | 34% |
| Harmon | High | 23% | 25% |
| Kingfisher | High | 21% | 36% |
| Pottawatomie | High | 21% | 16% |
| Johnston | High | 21% | 35% |
| Greer | High | 20% | 29% |
| Hughes | High | 20% | 30% |
| Stephens | High | 20% | 26% |
| Cleveland | High | 20% | 22% |
| Oklahoma | High | 20% | 10% |
| Canadian | High | 19% | 37% |
| Logan | High | 19% | 24% |
| Woods | High | 18% | 18% |
| Love | High | 17% | 21% |
| Cherokee | High | 17% | 7% |
| Blaine | High | 16% | 26% |
| Cimarron | High | 16% | 32% |
| Adair | Moderate | 14% | 3% |
| McClain | Moderate | 14% | 30% |
| Sequoyah | Moderate | 12% | 26% |
| Woodward | Moderate | 11% | 13% |
| Jefferson | Moderate | 11% | 48% |
| Major | Moderate | 11% | 25% |
| Grady | Moderate | 8% | 30% |
| Alfalfa | Moderate | 8% | 36% |
| Caddo | Moderate | 6% | 23% |
| Texas | Moderate | 6% | 53% |
| Delaware | Moderate | 6% | 11% |
| Beaver | Moderate | 5% | 24% |
| Beckham | Low | 5% | 18% |
| Ellis | Low | 3% | 14% |
| Harper | Low | 2% | 16% |
| Washita | Low | 1% | 33% |
| Dewey | Low | 1% | 21% |
| Custer | Low | 0% | 38% |
| Roger Mills | Low | 0% | 7% |
Risk metrics are computed from USDA SSURGO soil survey data (linear extensibility of soil components, area-weighted by county). Soil varies lot to lot — this is county-scale context, not a substitute for a site-specific geotechnical or structural assessment.