ZIP CodesZIP codes in Loudon County, Tennessee
Loudon County, Tennessee has 5 ZIP codes in this list, from 37742 to 37846. They cover 4 places, among them Lenoir City, Greenback, Loudon and Philadelphia.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 37742 | Greenback | 49.4 | 35.657, -84.171 |
| 37771 | Lenoir City | 50.1 | 35.810, -84.266 |
| 37772 | Lenoir City | 38.7 | 35.788, -84.219 |
| 37774 | Loudon | 88.2 | 35.729, -84.344 |
| 37846 | Philadelphia | 72.6 | 35.678, -84.431 |
The ZIP code areas of Loudon County add up to about 299 square miles of land (774 sq km) as the Census Bureau draws them. The largest is 37774 (Loudon), with 88.2 square miles.
Places with more than one code here: Lenoir City (2 codes).
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Greenback, TN 37742.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.