Post office locations in 57563
| Post Office | Address | Phone | Hours |
| OKREEK | 1 SE FIRST ST OKREEK, SD 57563 - 9998 | 605-856-2651 | Mon-Sat 09:30 AM - 11:30 AM Sun Closed |
| Post Office | Address | Phone | Hours |
| OKREEK | 1 SE FIRST ST OKREEK, SD 57563 - 9998 | 605-856-2651 | Mon-Sat 09:30 AM - 11:30 AM Sun Closed |