Post Offices List in Poweshiek County, Iowa:
| Brooklyn Post Office | 127 W Front St, Brooklyn, IA 52211 |
| Deep River Post Office | 400 Main St, Deep River, IA 52222 |
| Grinnell Post Office | 932 Broad St, Grinnell, IA 50112 |
| Malcom Post Office | 209 Main St, Malcom, IA 50157 |
| Montezuma Post Office | 201 E Liberty St, Montezuma, IA 50171 |