ZIP 37366 falls in Grundy County, Tennessee, where we hold 4,267 parcels measured as septic county-wide and 1,365 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 37366.
ZCTA 37366 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) |
|---|---|---|---|---|
| Grundy County, Tennessee | 100% | 5,268 | 4,267 | 1,365 |
| Franklin County, Tennessee | 0% | 18,787 | 11,011 | 6,989 |
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 4,267 parcels measured as septic for Grundy County, Tennessee as a whole, not broken out by ZIP.
ZIP 37366 spans 2 counties: Grundy County, Tennessee, Franklin County, Tennessee.