| Business | Phone |
| Us Post Office 1074 88th Ave W, Duluth 55808 | (218) 626-2959 |
| Us Post Office 200 Mount Royal Shopping Cir, Duluth 55803 | (218) 728-4589 |
| Us Post Office 215 N Central Ave, Duluth 55807 | (218) 624-5915 |
| Us Post Office 2800 W Michigan St, Duluth 55806 | (218) 723-2590 |
| Us Post Office 4427 E Superior St, Duluth 55804 | (218) 525-1216 |
| Us Post Office 515 W 1st St, Duluth 55802 | (218) 722-1681 |