| Locality | Post Code |
|---|---|
| Alburnett, Linn | 52202 |
| Bertram, Linn | 52403 |
| Cedar Rapids, Linn | 52401, 52402, 52403, 52404, 52405, … |
| Center Point, Linn | 52213 |
| Central City, Linn | 52214 |
| Coggon, Linn | 52218 |
| Covington, Linn | 52324 |
| Ely, Linn | 52227 |
| Fairfax, Linn | 52228 |
| Hiawatha, Linn | 52233 |
| Indian Creek, Linn | 52302 |
| Lisbon, Linn | 52253 |
| Marion, Linn | 52302 |
| Martelle, Linn | 52305 |
| Midway, Linn | 52302 |
| Mount Vernon, Linn | 52314 |
| Palo, Linn | 52324 |
| Prairieburg, Linn | 52219 |
| Robins, Linn | 52328 |
| Shueyville, Linn | 52404 |
| Springville, Linn | 52336 |
| Sutliff, Linn | 52253 |
| Toddville, Linn | 52341 |
| Troy Mills, Linn | 52344 |
| Viola, Linn | 52336 |
| Walford, Linn | 52351 |