ZIP 37840 falls in Morgan County, Tennessee, where we hold 6,353 parcels measured as septic county-wide and 1,500 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 37840.
ZCTA 37840 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) |
|---|---|---|---|---|
| Morgan County, Tennessee | 44% | — | 6,353 | 1,500 |
| Anderson County, Tennessee | 37% | 8,894 | 12,147 | 16,226 |
| Roane County, Tennessee | 19% | 18,206 | 11,677 | 10,297 |
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 6,353 parcels measured as septic for Morgan County, Tennessee as a whole, not broken out by ZIP.
ZIP 37840 spans 3 counties: Morgan County, Tennessee, Anderson County, Tennessee, Roane County, Tennessee.