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Jamestown, Ohio
Inside Jamestown's city limits, a shallow water table limits basements on 90% of mapped land, the 2nd-highest of 10 cities in Greene County. Shrink-swell clay limits houses without basements on under 1%.
That water-table share is above Greene County's 68%. FEMA's flood data list 1 flood losses since 2016 in ZIP code 45335 overlapping the city. Of its 977 homes, 75% were built before 1980; the median dates from 1951.
Data as of October 13, 2026 · sources · in Greene 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 Jamestown
Basement waterproofing in Jamestown: a shallow water table limits basements on 90% of Jamestown's mapped land, more than in 79% of Ohio cities, and the ZIP code overlapping Jamestown logged 1 FEMA flood losses since 2016.
About 800 of Jamestown's 977 homes are detached houses.
Soil under Jamestown city limits
| Expansive clay (limits slab homes) | 0.1% |
| High water table (limits basements) | 90.4% |
| Septic fields very limited | 98.6% |
| Clay swell (LEP, by area) | 3.9% |
| High-swell land (LEP 6%+) | 0.0% |
| Mapped soil | 804 acres |
What the numbers mean here
On 90% of Jamestown's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 99% of the land very limited for septic absorption fields.
Drought in Greene County
0% of Greene 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 Jamestown. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45335 | 100% | 1 | $4,019 |
Homes in Jamestown
| Housing units | 977 |
| Median year built | 1951 |
| Built before 1980 | 75% |
| Built 2000 or later | 10% |
| Owner-occupied | 67% |
| Median value, owner-occupied | $146,500 |
| Single-family detached | 78% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Bowersville | 6 mi | 30% | 100% |
| Cedarville | 7 mi | 4% | 64% |
| Octa | 8 mi | 49% | 98% |
| Port William | 8 mi | 2% | 79% |
| South Solon | 9 mi | 37% | 88% |
| Milledgeville | 9 mi | 38% | 100% |
| Jeffersonville | 10 mi | 37% | 97% |
| Clifton | 11 mi | 16% | 57% |
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