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Hillsboro, Ohio
Inside Hillsboro's city limits, a shallow water table limits basements on 40% of mapped land. Shrink-swell clay limits houses without basements on under 1%.
That water-table share is below Highland County's 66%. FEMA's flood data list no flood losses since 2016 in ZIP code 45133 overlapping the city. Of its 3,204 homes, 66% were built before 1980; the median dates from 1971.
Data as of October 13, 2026 · sources · in Highland 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 Hillsboro
Basement waterproofing in Hillsboro: a shallow water table limits basements on 40% of Hillsboro's mapped land.
About 2,000 of Hillsboro's 3,204 homes are detached houses.
Soil under Hillsboro city limits
| Expansive clay (limits slab homes) | 0.2% |
| High water table (limits basements) | 40.1% |
| Septic fields very limited | 67.7% |
| Clay swell (LEP, by area) | 3.9% |
| High-swell land (LEP 6%+) | 2.3% |
| Urban land, not rated | 8.8% |
| Mapped soil | 3,507 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Boston | 20% | n/a |
| Haubstadt | 17% | n/a |
| Otwell | 10% | n/a |
| Rossmoyne | 8% | 96% |
| Bratton | 5% | n/a |
| Genesee | 5% | n/a |
What the numbers mean here
On 40% of Hillsboro's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 68% of the land very limited for septic absorption fields.
Drought in Highland County
0% of Highland 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 Hillsboro. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45133 | 100% | 0 | $0 |
Homes in Hillsboro
| Housing units | 3,204 |
| Median year built | 1971 |
| Built before 1980 | 66% |
| Built 2000 or later | 9% |
| Owner-occupied | 53% |
| Median value, owner-occupied | $149,200 |
| Single-family detached | 64% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| New Vienna | 9 mi | 10% | 73% |
| Highland | 9 mi | 1% | 67% |
| Leesburg | 10 mi | 2% | 61% |
| Lynchburg | 10 mi | 1% | 69% |
| Martinsville | 13 mi | 5% | 79% |
| Mowrystown | 14 mi | 1% | 80% |
| Sinking Spring | 15 mi | under 1% | 12% |
| Greenfield | 15 mi | 1% | 53% |
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