Post Offices List in Deuel County, South Dakota:
| Astoria Post Office | 331 Main St, Astoria, SD 57213 |
| Brandt Post Office | 116 Main St, Brandt, SD 57218 |
| Clear Lake Post Office | 405 3rd St W, Clear Lake, SD 57226 |
| Gary Post Office | 1109 Coteau St, Gary, SD 57237 |
| Goodwin Post Office | 130 W Chicago Ave, Goodwin, SD 57238 |
| Toronto Post Office | 540 Main Ave, Toronto, SD 57268 |