Post Offices List in Lucas County, Iowa:
| Chariton Post Office | 126 S Grand St, Chariton, IA 50049 |
| Derby Post Office | 481 Front St, Derby, IA 50068 |
| Lucas Post Office | 106 E Front St, Lucas, IA 50151 |
| Russell Post Office | 103 S Maple St, Russell, IA 50238 |
| Williamson Post Office | 103 W South Ave, Williamson, IA 50272 |