23 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 37918 | Knoxville | 45,978 |
| 37920 | Knoxville | 43,509 |
| 37922 | Knoxville | 39,013 |
| 37919 | Knoxville | 31,401 |
| 37931 | Knoxville | 31,149 |
| 37923 | Knoxville | 30,874 |
| 37921 | Knoxville | 29,064 |
| 37849 | Powell | 28,872 |
| 37934 | Farragut | 28,237 |
| 37917 | Knoxville | 25,738 |
| 37932 | Knoxville | 23,330 |
| 37912 | Knoxville | 22,009 |
| 37914 | Knoxville | 20,917 |
| 37938 | Knoxville | 16,904 |
| 37909 | Knoxville | 16,848 |
| 37916 | Knoxville | 14,771 |
| 37924 | Knoxville | 14,672 |
| 37721 | Corryton | 14,649 |
| 37871 | Strawberry Plains | 8,548 |
| 37915 | Knoxville | 6,124 |
| 37806 | Mascot | 3,011 |
| 37902 | Knoxville | 2,308 |
| 37929 | Knoxville | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 23 ZCTAs in Knox County, Tennessee (US Census).