| Post Office Name | City/State | Address | Phone Number | Action |
|---|---|---|---|---|
| Downtown New Castle Post Office | New Castle, PA 16101 | 151 Cascade Galleria | 7246524611 | View Details Get Directions |
| Neshannock Post Office | New Castle, PA 16105 | 4 E Maitland Ln | 7246542241 | View Details Get Directions |
| New Castle Post Office | New Castle, PA 16108 | 435 S Cascade St | 7246567221 | View Details Get Directions |
| New Castle Carrier Annex Post Office | New Castle, PA 16101 | 20 E South St | 7246523157 | View Details Get Directions |
| Public Collection Box | New Castle, PA 16101 | 100 S Jefferson St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 104 Margaret St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 104 Plaza St S | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 120 E Washington St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16105 | 1211 Wilmington Ave | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 15 W Washington St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 1700 New Butler Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16105 | 1700 Wilmington Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16105 | 1707 Wilmington Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 18 N Mercer St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 18 N Mill St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16102 | 202 N Liberty St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 2026 W State St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 2501 W State St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 2515 W State St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 2650 Ellwood Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16105 | 3009 Wilmington Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16105 | 3230 Wilmington Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16105 | 3300 Wilmington Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16105 | 3443 Wilmington Rd | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 41 S Mercer St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 430 Court St | -- | Get Directions |
| Public Collection Box | New Castle, PA 16101 | 704 Wilmington Ave | -- | Get Directions |
