5 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 37774 | Loudon | 21,784 |
| 37771 | Lenoir City | 18,042 |
| 37772 | Lenoir City | 14,646 |
| 37742 | Greenback | 7,046 |
| 37846 | Philadelphia | 4,579 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 5 ZCTAs in Loudon County, Tennessee (US Census).