HomeOhioShelby CountyPort Jefferson
Port Jefferson, Ohio
Inside Port Jefferson's city limits, a shallow water table limits basements on 30% of mapped land. Shrink-swell clay limits houses without basements on 2%.
That water-table share is below Shelby County's 94%. FEMA's flood data list no flood losses since 2016 in ZIP code 45360 overlapping the city. Of its 195 homes, 83% were built before 1980; the median dates from 1954.
Data as of October 13, 2026 · sources · in Shelby 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 Port Jefferson
Basement waterproofing in Port Jefferson: a shallow water table limits basements on 30% of Port Jefferson's mapped land.
About 200 of Port Jefferson's 195 homes are detached houses.
Soil under Port Jefferson city limits
| Expansive clay (limits slab homes) | 1.6% |
| High water table (limits basements) | 29.6% |
| Septic fields very limited | 93.7% |
| Clay swell (LEP, by area) | 4.6% |
| High-swell land (LEP 6%+) | 0.0% |
| Mapped soil | 99 acres |
What the numbers mean here
On 30% of Port Jefferson's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 94% of the land very limited for septic absorption fields.
Drought in Shelby County
0% of Shelby 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 Port Jefferson. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45360 | 99% | 0 | $0 |
Homes in Port Jefferson
| Housing units | 195 |
| Median year built | 1954 |
| Built before 1980 | 83% |
| Built 2000 or later | 10% |
| Owner-occupied | 81% |
| Median value, owner-occupied | $101,000 |
| Single-family detached | 84% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Sidney | 5 mi | 8% | 59% |
| Anna | 6 mi | 22% | 97% |
| Quincy | 7 mi | 7% | 82% |
| Jackson Center | 8 mi | 30% | 99% |
| De Graff | 9 mi | 5% | 55% |
| Botkins | 10 mi | 20% | 89% |
| Kettlersville | 11 mi | 40% | 99% |
| Lockington | 11 mi | 1% | 79% |
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