Founded in 1836, Caldwell County is one of 114 counties in the state of Missouri. Historically, Caldwell County was formed from Ray County. The city of Kingston is the county seat. With FIPS code of 25, Caldwell County has a population of 8,897 and area of 429 square miles (1,111 km2).
List of all cities in Caldwell County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Braymer, MO | 64624 | 816/975 |
| Breckenridge, MO | 64625 | 660 |
| Cowgill, MO | 64637 | 660 |
| Hamilton, MO | 64644 | 816/975 |
| Kidder, MO | 64649 | 816/975 |
| Kingston, MO | 64650 | 816/975 |
| Mirabile, MO | 64671 | 660 |
| Polo, MO | 64671 | 660 |