82 counties mapped. On average, 19% of Mississippi 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 % |
|---|---|---|---|
| Humphreys | Severe | 86% | 7% |
| Sharkey | Severe | 80% | 16% |
| Sunflower | Severe | 76% | 11% |
| Issaquena | Severe | 71% | 11% |
| Tunica | Severe | 69% | 11% |
| Quitman | Severe | 67% | 26% |
| Bolivar | Severe | 66% | 18% |
| Washington | Severe | 66% | 17% |
| Noxubee | Severe | 61% | 10% |
| Leflore | Severe | 61% | 21% |
| Coahoma | Severe | 50% | 22% |
| Clay | Severe | 44% | 12% |
| Oktibbeha | Severe | 42% | 8% |
| Lowndes | Severe | 39% | 5% |
| Tallahatchie | Severe | 34% | 19% |
| Chickasaw | Severe | 33% | 13% |
| Scott | Severe | 32% | 15% |
| Monroe | Severe | 31% | 10% |
| Pontotoc | Severe | 31% | 8% |
| Lee | High | 29% | 15% |
| Yazoo | High | 22% | 8% |
| Kemper | High | 22% | 23% |
| Wilkinson | High | 20% | 2% |
| Greene | High | 19% | 10% |
| Warren | High | 19% | 12% |
| Rankin | High | 19% | 6% |
| Jasper | High | 18% | 23% |
| Wayne | High | 18% | 13% |
| Lamar | High | 16% | 7% |
| Tippah | High | 16% | 16% |
| Clarke | High | 15% | 17% |
| Prentiss | High | 15% | 15% |
| Copiah | Moderate | 14% | 2% |
| Lafayette | Moderate | 14% | 6% |
| Perry | Moderate | 13% | 8% |
| Holmes | Moderate | 12% | 13% |
| Webster | Moderate | 12% | 21% |
| Calhoun | Moderate | 12% | 26% |
| Jefferson | Moderate | 12% | 3% |
| Choctaw | Moderate | 12% | 16% |
| Lawrence | Moderate | 11% | 6% |
| Adams | Moderate | 11% | 1% |
| George | Moderate | 10% | 8% |
| Franklin | Moderate | 10% | 1% |
| Newton | Moderate | 10% | 27% |
| Stone | Moderate | 10% | 1% |
| Union | Moderate | 10% | 12% |
| Winston | Moderate | 9% | 23% |
| Pearl River | Moderate | 9% | 0% |
| Forrest | Moderate | 8% | 5% |
| Simpson | Moderate | 8% | 4% |
| Jones | Moderate | 7% | 9% |
| Jefferson Davis | Moderate | 7% | 1% |
| Lauderdale | Moderate | 6% | 35% |
| Grenada | Moderate | 6% | 7% |
| Smith | Moderate | 6% | 14% |
| Covington | Low | 5% | 4% |
| Jackson | Low | 5% | 6% |
| Panola | Low | 5% | 2% |
| Claiborne | Low | 4% | 2% |
| DeSoto | Low | 4% | 11% |
| Carroll | Low | 3% | 10% |
| Marion | Low | 3% | 3% |
| Alcorn | Low | 3% | 8% |
| Hinds | Low | 3% | 3% |
| Lincoln | Low | 2% | 17% |
| Tate | Low | 2% | 2% |
| Yalobusha | Low | 2% | 1% |
| Itawamba | Low | 2% | 15% |
| Marshall | Low | 2% | 2% |
| Amite | Low | 2% | 6% |
| Neshoba | Low | 2% | 29% |
| Hancock | Low | 2% | 2% |
| Harrison | Low | 1% | 0% |
| Madison | Low | 1% | 8% |
| Attala | Low | 1% | 12% |
| Leake | Low | 1% | 9% |
| Montgomery | Low | 1% | 7% |
| Walthall | Low | 0% | 1% |
| Benton | Low | 0% | 15% |
| Pike | Low | 0% | 5% |
| Tishomingo | Low | 0% | 4% |
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.