ZIP 37309 falls in McMinn County, Tennessee, where we hold 9,089 parcels measured as septic county-wide and 11,655 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 37309.
ZCTA 37309 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) |
|---|---|---|---|---|
| McMinn County, Tennessee | 88% | — | 9,089 | 11,655 |
| Polk County, Tennessee | 12% | — | 5,505 | 1,545 |
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 9,089 parcels measured as septic for McMinn County, Tennessee as a whole, not broken out by ZIP.
ZIP 37309 spans 2 counties: McMinn County, Tennessee, Polk County, Tennessee.