22 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 52402 | Cedar Rapids | 43,076 |
| 52302 | Marion | 42,732 |
| 52404 | Cedar Rapids | 42,582 |
| 52405 | Cedar Rapids | 25,889 |
| 52403 | Cedar Rapids | 23,023 |
| 52411 | Cedar Rapids | 8,357 |
| 52233 | Hiawatha | 7,008 |
| 52314 | Mount Vernon | 6,048 |
| 52213 | Center Point | 3,977 |
| 52228 | Fairfax | 3,865 |
| 52227 | Ely | 2,864 |
| 52328 | Robins | 2,861 |
| 52214 | Central City | 2,770 |
| 52336 | Springville | 2,459 |
| 52401 | Cedar Rapids | 2,192 |
| 52324 | Palo | 1,955 |
| 52352 | Walker | 1,906 |
| 52218 | Coggon | 1,700 |
| 52341 | Toddville | 1,372 |
| 52202 | Alburnett | 1,231 |
| 52219 | Prairieburg | 140 |
| 52344 | Troy Mills | 70 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 22 ZCTAs in Linn County, Iowa (US Census).