Post Offices List in McCormick County, South Carolina:
| Clarks Hill Post Office | 13423 Sc Highway 28, Clarks Hill, SC 29821 |
| MC Cormick Post Office | 201 N Pine St, Mc Cormick, SC 29835 |
| Mount Carmel Post Office | 102 Depot St, Mount Carmel, SC 29840 |
| Parksville Post Office | 205 Railroad Ave, Parksville, SC 29844 |
| Plum Branch Post Office | 102 Depot St N, Plum Branch, SC 29845 |