ZIP 37888 falls in Grainger County, Tennessee, where we hold 9,035 parcels measured as septic county-wide and 1,387 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 37888.
ZCTA 37888 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) |
|---|---|---|---|---|
| Grainger County, Tennessee | 91% | — | 9,035 | 1,387 |
| Union County, Tennessee | 9% | 6,766 | 6,762 | 1,198 |
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 9,035 parcels measured as septic for Grainger County, Tennessee as a whole, not broken out by ZIP.
ZIP 37888 spans 2 counties: Grainger County, Tennessee, Union County, Tennessee.