| Business | Phone |
| Us Post Office 11200 S Airport Dr, Columbia 65201 | (573) 874-6553 |
| Us Post Office 3212 Lemone Industrial Blvd #B, Columbia 65201 | (573) 441-1861 |
| Us Post Office 511 E Walnut St, Columbia 65201 | (573) 876-7800 |
| Columbia Post Office 511 E Walnut St, Columbia 65201 | (573) 876-7816 |