ZIP 37604 falls in Washington County, Tennessee, where we hold 17,810 parcels measured as septic county-wide and 24,967 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 37604.
ZCTA 37604 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) |
|---|---|---|---|---|
| Washington County, Tennessee | 94% | — | 17,810 | 24,967 |
| Carter County, Tennessee | 6% | 4,949 | 12,231 | 8,446 |
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 17,810 parcels measured as septic for Washington County, Tennessee as a whole, not broken out by ZIP.
ZIP 37604 spans 2 counties: Washington County, Tennessee, Carter County, Tennessee.