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Martinsville, Ohio
Inside Martinsville's city limits, a shallow water table limits basements on 79% of mapped land, higher than 65% of Ohio cities. Shrink-swell clay limits houses without basements on 5%, the 4th-highest of 8 cities in Clinton County.
That water-table share is below Clinton County's 93%. FEMA's flood data list 1 flood losses since 2016 in ZIP code 45146 overlapping the city. Of its 154 homes, 83% were built before 1980; the median dates from 1948.
Data as of October 13, 2026 · sources · in Clinton County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
of homes built before 1980
Basement waterproofing in Martinsville
Basement waterproofing in Martinsville: a shallow water table limits basements on 79% of Martinsville's mapped land, more than in 65% of Ohio cities, and the ZIP code overlapping Martinsville logged 1 FEMA flood losses since 2016.
About 100 of Martinsville's 154 homes are detached houses.
Soil under Martinsville city limits
| Expansive clay (limits slab homes) | 4.8% |
| High water table (limits basements) | 79.3% |
| Septic fields very limited | 78.2% |
| Clay swell (LEP, by area) | 4.2% |
| High-swell land (LEP 6%+) | 3.8% |
| Mapped soil | 237 acres |
What the numbers mean here
On 79% of Martinsville's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 78% of the land very limited for septic absorption fields.
Drought in Clinton County
0% of Clinton 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 Martinsville. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45146 | 100% | 1 | $73,702 |
Homes in Martinsville
| Housing units | 154 |
| Median year built | 1948 |
| Built before 1980 | 83% |
| Built 2000 or later | 4% |
| Owner-occupied | 81% |
| Median value, owner-occupied | $109,800 |
| Single-family detached | 90% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Midland | 5 mi | 1% | 100% |
| Lynchburg | 6 mi | 1% | 69% |
| New Vienna | 6 mi | 10% | 73% |
| Wilmington | 7 mi | 15% | 93% |
| Blanchester | 9 mi | 1% | 94% |
| Clarksville | 11 mi | 0% | 41% |
| Highland | 11 mi | 1% | 67% |
| Fayetteville | 11 mi | 1% | 87% |
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