Post Offices List in Faulk County, South Dakota:
| Cresbard Post Office | 206 Main St, Cresbard, SD 57435 |
| Faulkton Post Office | 115 8th Ave S, Faulkton, SD 57438 |
| Onaka Post Office | 123 Main St, Onaka, SD 57466 |
| Rockham Post Office | 116 S Broadway Ave, Rockham, SD 57470 |
| Seneca Post Office | 200 Pine St, Seneca, SD 57473 |