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Marshall, Texas
Inside Marshall's city limits, shrink-swell clay limits houses without basements on 6% of mapped land, the 5th-highest of 5 cities in Harrison County. A shallow water table limits basements on 38%, the 5th-highest of 5 cities in Harrison County.
That clay share is below Harrison County's 24%. FEMA's flood data list 6 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 10,007 homes, 67% were built before 1980; the median dates from 1969.
Data as of October 13, 2026 · sources · in Harrison County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 2 overlapping ZIPs
of homes built before 1980
Foundation repair in Marshall
Foundation repair in Marshall: shrink-swell clay limits slab homes on 6% of Marshall's mapped land.
About 7,900 of Marshall's 10,007 homes are detached houses.
| Who designs the repair | The ASCE Texas Section's repair guidelines say a Texas-licensed engineer should evaluate the foundation and design the repair (2022 guidelines) |
| Prices | Cost guide ranges compared |
Soil under Marshall city limits
| Expansive clay (limits slab homes) | 6.1% |
| High water table (limits basements) | 37.8% |
| Septic fields very limited | 83.8% |
| Clay swell (LEP, by area) | 3.2% |
| High-swell land (LEP 6%+) | 2.6% |
| Mapped soil | 19,074 acres |
What the numbers mean here
On 38% of Marshall's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 84% of the land very limited for septic absorption fields.
Drought in Harrison County
100% of Harrison County is in drought (D1 or worse) on the October 13, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Marshall. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75672 | 64% | 6 | $152,690 |
| 75670 | 36% | 0 | $0 |
Homes in Marshall
| Housing units | 10,007 |
| Median year built | 1969 |
| Built before 1980 | 67% |
| Built 2000 or later | 13% |
| Owner-occupied | 60% |
| Median value, owner-occupied | $141,400 |
| Single-family detached | 79% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Scottsville | 7 mi | 19% | 44% |
| Hallsville | 13 mi | 26% | 71% |
| Jefferson | 15 mi | 4% | 68% |
| Uncertain | 17 mi | 63% | 77% |
| Waskom | 17 mi | 69% | 71% |
| Easton | 18 mi | 12% | 61% |
| Tatum | 18 mi | 32% | 35% |
| Beckville | 21 mi | 51% | 22% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · Census ACS 2020-2024. Methods · Data status