Post Offices List in Howard County, Iowa:
| Chester Post Office | 205 Main St, Chester, IA 52134 |
| Cresco Post Office | 128 2nd Ave W, Cresco, IA 52136 |
| Elma Post Office | 412 Main St, Elma, IA 50628 |
| Lime Springs Post Office | 108 W Main St, Lime Springs, IA 52155 |
| Protivin Post Office | 221 S Main St, Protivin, IA 52163 |