Post Offices List in Frankford City, Delaware:
| Frankford Post Office | 1 Main St, Frankford, DE 19945 |
| Sussex County Carrier Annex Post Office | 35994 Zion Church Rd, Frankford, DE 19945 |
| Frankford Post Office | 1 Main St, Frankford, DE 19945 |
| Sussex County Carrier Annex Post Office | 35994 Zion Church Rd, Frankford, DE 19945 |