| Post Office Name | City/State | Address | Phone Number | Action |
|---|---|---|---|---|
| Smithtown Post Office | Smithtown, NY 11787 | 25 Route 111 | 6313606709 | View Details Get Directions |
| Mailbox in Post Office Lobby | Smithtown, NY 11787 | 150 Oser Ave | -- | Get Directions |
| Mailbox in Post Office Lobby | Smithtown, NY 11787 | 960 Wheeler Rd | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 10 Gilpin Ave | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 100 Lawrence Ave | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 110 Ricefield Ln | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 111 Route 347 | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 117 E Main St | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 1200 Veterans Memorial Hwy | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 140 Adams Ave | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 140 Fell Ct | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 150 Motor Pkwy | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 1785 N Expressway Dr | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 200 Motor Pkwy | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 2000 Bishops Rd | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 22 Arkay Dr | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 222 E Main St | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 225 Rabro Dr | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 28 Commerce Drive | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 285 Oser Ave | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 300 Motor Pkwy | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 300 Rabro Dr | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 308 W Main St | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 313 Avalon Cir | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 315 E Main St | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 335 Route 347 | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 35 Manor Rd | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 390 Power Dr | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 425 Oser Ave | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 48 Route 25 A | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 490 Wheeler Rd | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 496 Smithtown Byp | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 50 Route 111 | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 55 Kennedy Dr | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 550 Smithtown Byp | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 560 Wheeler Rd | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 599 Route 347 | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 601 Veterans Memorial Hwy | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 725 Veterans Memorial Hwy | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 80 Maple Ave | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 800 Veterans Memorial Hwy | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 811 W Jericho Tpke | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 821 W Jericho Tpke | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 975 W Jericho Tpke | -- | Get Directions |
| Public Collection Box | Smithtown, NY 11787 | 99 W Main St | -- | Get Directions |
