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Williamsburg, Ohio
Inside Williamsburg's city limits, a shallow water table limits basements on 66% of mapped land, the 3rd-highest of 10 cities in Clermont County. Shrink-swell clay limits houses without basements on 3%, the 4th-highest of 10 cities in Clermont County.
That water-table share is close to Clermont County's 67%. FEMA's flood data list 4 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 1,076 homes, 69% were built before 1980; the median dates from 1961.
Data as of October 13, 2026 · sources · in Clermont 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
Basement waterproofing in Williamsburg
Basement waterproofing in Williamsburg: a shallow water table limits basements on 66% of Williamsburg's mapped land, more than in 50% of Ohio cities, and the 2 ZIP codes overlapping Williamsburg logged 4 FEMA flood losses since 2016.
In Clermont County, 43% of the 35 flood-loss buildings with a recorded foundation type had basements.
About 800 of Williamsburg's 1,076 homes are detached houses.
Soil under Williamsburg city limits
| Expansive clay (limits slab homes) | 3.3% |
| High water table (limits basements) | 65.8% |
| Septic fields very limited | 87.2% |
| Clay swell (LEP, by area) | 4.3% |
| High-swell land (LEP 6%+) | 8.7% |
| Urban land, not rated | 9.9% |
| Mapped soil | 1,666 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Rossmoyne | 15% | 96% |
| Westboro | 11% | n/a |
| Clermont | 10% | n/a |
| Jonesboro | 9% | n/a |
| Cincinnati | 6% | n/a |
| Schaffer | 6% | n/a |
What the numbers mean here
On 66% of Williamsburg's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 87% of the land very limited for septic absorption fields.
Drought in Clermont County
0% of Clermont 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 Williamsburg. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45176 | 79% | 1 | $5,092 |
| 45103 | 21% | 3 | $164,089 |
Homes in Williamsburg
| Housing units | 1,076 |
| Median year built | 1961 |
| Built before 1980 | 69% |
| Built 2000 or later | 15% |
| Owner-occupied | 62% |
| Median value, owner-occupied | $196,900 |
| Single-family detached | 77% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Owensville | 6 mi | 4% | 71% |
| Batavia | 7 mi | 10% | 43% |
| Mount Orab | 7 mi | 9% | 92% |
| Bethel | 7 mi | 2% | 64% |
| Hamersville | 10 mi | 3% | 100% |
| Fayetteville | 11 mi | 1% | 87% |
| Sardinia | 14 mi | 16% | 81% |
| New Richmond | 14 mi | 6% | 23% |
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