Post Offices List in DeKalb County, Tennessee:
| Alexandria Post Office | 100 High St, Alexandria, TN 37012 |
| Dowelltown Post Office | 101 Village Sq, Dowelltown, TN 37059 |
| Liberty Post Office | 230 E Main St, Liberty, TN 37095 |
| Smithville Post Office | 100 S 1st St Ste 104, Smithville, TN 37166 |