Founded in 1837, Linn County is one of 114 counties in the state of Missouri. Historically, Linn County was formed from Chariton County. The city of Linneus is the county seat. With FIPS code of 115, Linn County has a population of 11,843 and area of 620 square miles (1,606 km2).
List of all cities in Linn County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Brookfield, MO | 64628 | 660 |
| Browning, MO | 64630 | 660 |
| Bucklin, MO | 64631 | 660 |
| Laclede, MO | 64651 | 660 |
| Linneus, MO | 64653 | 660 |
| Marceline, MO | 64658 | 660 |
| Meadville, MO | 64659 | 660 |
| New Boston, MO | 63557 | 660 |
| Purdin, MO | 64674 | 660 |
| Saint Catharine, MO | 64628 | 660 |