ZIP 37643 falls in Carter County, Tennessee, where we hold 12,231 parcels measured as septic county-wide and 8,446 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 37643.
ZCTA 37643 is not entirely inside one county. Land-area share is from the 2020 Census ZCTA-to-county relationship file.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Carter County, Tennessee | 99% | 4,949 | 12,231 | 8,446 |
| Unicoi County, Tennessee | 1% | 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 12,231 parcels measured as septic for Carter County, Tennessee as a whole, not broken out by ZIP.
ZIP 37643 spans 2 counties: Carter County, Tennessee, Unicoi County, Tennessee.