22 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 52404 | Cedar Rapids | 42,958 |
| 52402 | Cedar Rapids | 42,938 |
| 52302 | Marion | 42,706 |
| 52405 | Cedar Rapids | 26,526 |
| 52403 | Cedar Rapids | 22,551 |
| 52411 | Cedar Rapids | 8,342 |
| 52233 | Hiawatha | 7,000 |
| 52314 | Mount Vernon | 6,200 |
| 52213 | Center Point | 4,114 |
| 52228 | Fairfax | 3,802 |
| 52227 | Ely | 2,996 |
| 52214 | Central City | 2,761 |
| 52328 | Robins | 2,712 |
| 52336 | Springville | 2,397 |
| 52324 | Palo | 2,216 |
| 52401 | Cedar Rapids | 2,181 |
| 52352 | Walker | 1,833 |
| 52218 | Coggon | 1,413 |
| 52341 | Toddville | 1,378 |
| 52202 | Alburnett | 1,269 |
| 52219 | Prairieburg | 143 |
| 52344 | Troy Mills | 67 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 22 ZCTAs in Linn County, Iowa (US Census).