23 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 37918 | Knoxville | 45,741 |
| 37920 | Knoxville | 42,537 |
| 37922 | Knoxville | 39,373 |
| 37923 | Knoxville | 31,364 |
| 37919 | Knoxville | 30,956 |
| 37931 | Knoxville | 30,463 |
| 37849 | Powell | 29,022 |
| 37921 | Knoxville | 28,571 |
| 37934 | Farragut | 27,675 |
| 37917 | Knoxville | 25,418 |
| 37912 | Knoxville | 22,051 |
| 37932 | Knoxville | 21,117 |
| 37914 | Knoxville | 20,579 |
| 37938 | Knoxville | 17,366 |
| 37909 | Knoxville | 16,868 |
| 37916 | Knoxville | 14,864 |
| 37721 | Corryton | 14,522 |
| 37924 | Knoxville | 14,092 |
| 37871 | Strawberry Plains | 9,487 |
| 37915 | Knoxville | 5,318 |
| 37806 | Mascot | 2,884 |
| 37902 | Knoxville | 2,384 |
| 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).