Post Offices List in Hammond City, Indiana:
| Hammond Post Office | 5530 Sohl Ave, Hammond, IN 46320 |
| Hessville Post Office | 6530 Kennedy Ave, Hammond, IN 46323 |
| South Calumet Avenue Post Office | 7142 Calumet Ave, Hammond, IN 46324 |
| Hammond Post Office | 5530 Sohl Ave, Hammond, IN 46320 |
| Hessville Post Office | 6530 Kennedy Ave, Hammond, IN 46323 |
| South Calumet Avenue Post Office | 7142 Calumet Ave, Hammond, IN 46324 |