The city of Piney Flats is assigned specific ZIP Code(s) by the United States Postal Service (USPS) to make mail delivery accurate and efficient. A ZIP Code in Piney Flats helps identify the correct postal area, ensuring that letters, parcels, and packages reach the right neighborhood or post office without delay. For residents, businesses, and visitors, knowing the correct Piney Flats ZIP Code is important not only for mailing purposes but also for location-based services, navigation, and demographic reference.
| Post Office | Piney Flats |
| County | Sullivan |
| State | Tennessee |
| ZIP Code | 37686 |
| Post Office | Piney Flats |
| County | Sullivan |
| State | Tennessee |
| ZIP Code | 37699 |