ZIP 37657 falls in Unicoi County, Tennessee, where we hold 3,068 parcels measured as septic county-wide and 3,779 on sewer. We do not have a per-ZIP parcel count for this county, so this is the county total, not a count specific to ZIP 37657.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Unicoi County, Tennessee | 100% | 8,747 | 3,068 | 3,779 |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We hold 3,068 parcels measured as septic for Unicoi County, Tennessee as a whole, not broken out by ZIP.
ZIP 37657 falls in Unicoi County, Tennessee.