| Business | Phone |
| Airport Mail Facility 9855 Air Cargo Rd, St Louis 63145 | (314) 436-4550 |
| Us Post Office 1100 Town And Country Commons, St Louis 63107 | (314) 000-1111 |
| Us Post Office 1106 Walnut St, St Louis 63199 | (314) 539-9300 |
| Us Post Office 111 N 6th St, St Louis 63101 | (314) 000-1111 |
| Us Post Office 1140 Olive St, St Louis 63101 | (314) 000-1111 |
| Us Post Office 1650 Shackelford Rd, St Louis 63107 | (314) 000-1111 |
| Us Post Office 1720 Market St, St Louis 63155 | (314) 000-1111 |
| Us Post Office 1914 S Broadway, St Louis 63104 | (314) 000-1111 |
| Us Post Office 2125 Saint Louis Ave, St Louis 63106 | (314) 000-1111 |
| Us Post Office 2700 S Jefferson Ave, St Louis 63104 | (314) 000-1111 |
| Us Post Office 2920 Meramec St, St Louis 63118 | (314) 000-1111 |
| Us Post Office 3198 S Grand Blvd, St Louis 63118 | (314) 000-1111 |
| Us Post Office 3232 Clifton Ave, St Louis 63139 | (314) 000-1111 |
| Us Post Office 3415 N Kingshighway Blvd, St Louis 63115 | (314) 000-1111 |
| Us Post Office 4021 Laclede Ave, St Louis 63108 | (314) 000-1111 |
| Us Post Office 4120 Manchester Ave, St Louis 63110 | (314) 000-1111 |
| Us Post Office 4323 N Grand Blvd, St Louis 63107 | (314) 000-1111 |
| Us Post Office 44 Plaza Sq, St Louis 63103 | (314) 000-1111 |
| Us Post Office 4455 Ridgewood Ave, St Louis 63116 | (314) 000-1111 |
| Us Post Office 8215 Pelham Ave, St Louis 63147 | (314) 000-1111 |
| Us Post Office 8390 N Broadway, St Louis 63147 | (314) 000-1111 |
| Us Post Office 901 N Garrison Ave, St Louis 63106 | (314) 000-1111 |
| Us Post Office 10701 Lambert International, St Louis 63145 | (314) 000-1111 |
| Us Post Office 11001 Dunklin Dr, St Louis 63138 | (314) 000-1111 |
| Us Post Office 1203 Lemay Ferry Rd, St Louis 63125 | (314) 000-1111 |
| Us Post Office 1409 Hamilton Ave, St Louis 63112 | (314) 000-1111 |
| Us Post Office 146 Crestwood Plz, St Louis 63126 | (314) 000-1111 |
| Us Post Office 2002 Congressional Dr, St Louis 63146 | (314) 000-1111 |
| Us Post Office 305 Saint Louis Ave, St Louis 63135 | (314) 000-1111 |
| Us Post Office 375 S County Center Way # A, St Louis 63129 | (314) 000-1111 |
| Us Post Office 423 S County Center Way, St Louis 63129 | (314) 000-1111 |
| Us Post Office 5636 Telegraph Rd, St Louis 63129 | (314) 000-1111 |
| Us Post Office 721 Emerson Rd, St Louis 63141 | (314) 692-5501 |
| Us Post Office 7217 Watson Rd, St Louis 63119 | (314) 000-1111 |
| Us Post Office 7450 Natural Bridge Rd, St Louis 63121 | (314) 385-2694 |
| Us Post Office 7750 Maryland Ave, St Louis 63105 | (314) 000-1111 |
| Us Post Office 7768 Gravois Rd, St Louis 63123 | (314) 000-1111 |
| Us Post Office 9040 Lackland Rd, St Louis 63114 | (314) 000-1111 |
| Us Post Office 9855 Air Cargo Rd, St Louis 63145 | (314) 000-1111 |
| Main Post Office 1720 Market St, St Louis 63155 | (314) 436-4073 |