| Locality | Post Code |
|---|---|
| Arcadia, Carroll | 51430 |
| Breda, Carroll | 51436 |
| Carroll, Carroll | 51401 |
| Coon Rapids, Carroll | 50058 |
| Dedham, Carroll | 51440 |
| Glidden, Carroll | 51443 |
| Halbur, Carroll | 51444 |
| Lake City, Carroll | 51449 |
| Lanesboro, Carroll | 51451 |
| Lidderdale, Carroll | 51452 |
| Lohrville, Carroll | 51453 |
| Manning, Carroll | 51455 |
| Maple River, Carroll | 51401 |
| Mount Carmel, Carroll | 51401 |
| Ralston, Carroll | 51459 |
| Roselle, Carroll | 51401 |
| Templeton, Carroll | 51463 |
| Westside, Carroll | 51467 |
| Willey, Carroll | 51401 |