This table ranks all 21 ZIP codes in the Decatur, AL MSA by estimated 2022 population, from highest to lowest.
| # | ZIP Code | Place Name | Population (2022) |
|---|---|---|---|
| 1 | ZIP 35601 | Decatur | 34,817 |
| 2 | ZIP 35603 | Decatur | 32,372 |
| 3 | ZIP 35640 | Hartselle | 26,909 |
| 4 | ZIP 35016 | Arab | 17,532 |
| 5 | ZIP 35650 | Moulton | 13,101 |
| 6 | ZIP 35179 | Vinemont | 8,835 |
| 7 | ZIP 35654 | Russellville | 8,314 |
| 8 | ZIP 35673 | Trinity | 7,698 |
| 9 | ZIP 35670 | Somerville | 7,181 |
| 10 | ZIP 35622 | Falkville | 6,650 |
| 11 | ZIP 35754 | Laceys Spring | 5,555 |
| 12 | ZIP 35672 | Town Creek | 5,387 |
| 13 | ZIP 35175 | Union Grove | 4,986 |
| 14 | ZIP 35619 | Danville | 4,739 |
| 15 | ZIP 35643 | Hillsboro | 4,008 |
| 16 | ZIP 35621 | Eva | 3,242 |
| 17 | ZIP 35087 | Joppa | 2,923 |
| 18 | ZIP 35019 | Baileyton | 2,233 |
| 19 | ZIP 35618 | Courtland | 1,891 |
| 20 | ZIP 35651 | Mount Hope | 1,384 |
| 21 | ZIP 35775 | Valhermoso Springs | 555 |