Post Offices List in Traill County, North Dakota:
| Buxton Post Office | 309 Broadway, Buxton, ND 58218 |
| Clifford Post Office | 100 Garfield Ave W, Clifford, ND 58016 |
| Galesburg Post Office | 102 Dakota Ave E, Galesburg, ND 58035 |
| Hatton Post Office | 611 Railroad Ave E, Hatton, ND 58240 |
| Hillsboro Post Office | 16 1st St Nw, Hillsboro, ND 58045 |
| Mayville Post Office | 37 1st Ave Ne, Mayville, ND 58257 |
| Portland Post Office | 629 Parke Ave, Portland, ND 58274 |