Founded on Dec 21, 1837, Linn County is one of 99 counties in the state of Iowa. Historically, Linn County was formed from Wisconsin Territory. The city of Cedar Rapids is the county seat. With FIPS code of 113, Linn County has a population of 228,939 and area of 718 square miles (1,860 km2).
List of all cities in Linn County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Aegon USA, IA | 52499 | 319 |
| Alburnett, IA | 52202 | 319 |
| Cedar Rapids, IA | 52401 | 319 |
| 52402 | 319 | |
| 52403 | 319 | |
| 52404 | 319 | |
| 52405 | 319 | |
| 52406 | 319 | |
| 52407 | 319 | |
| 52408 | 319 | |
| 52409 | 319 | |
| 52410 | 319 | |
| 52411 | 319 | |
| 52497 | 319 | |
| 52498 | 319 | |
| 52499 | 319 | |
| Center Point, IA | 52213 | 319 |
| Central City, IA | 52214 | 319 |
| Coggon, IA | 52218 | 319 |
| Covington, IA | 52324 | 319 |
| Ely, IA | 52227 | 319 |
| Fairfax, IA | 52228 | 319 |
| Hiawatha, IA | 52233 | 319 |
| Indian Creek, IA | 52302 | 319 |
| Life Investors Inc, IA | 52499 | 319 |
| Lisbon, IA | 52253 | 319 |
| Marion, IA | 52302 | 319 |
| Midway, IA | 52302 | 319 |
| Mount Vernon, IA | 52314 | 319 |
| Nordstrom, IA | 52497 | 319 |
| Palo, IA | 52324 | 319 |
| Prairieburg, IA | 52219 | 319 |
| Robins, IA | 52328 | 319 |
| 52411 | 319 | |
| Rockwell Collins, IA | 52498 | 319 |
| Springville, IA | 52336 | 319 |
| Sutliff, IA | 52253 | 319 |
| Toddville, IA | 52341 | 319 |
| Troy Mills, IA | 52344 | 319 |
| Viola, IA | 52350 | 319 |
| Walker, IA | 52352 | 319 |
| Waubeek, IA | 52214 | 319 |
| Whittier, IA | 52336 | 319 |