Town of Smithtown, NY ZIP Codes
Town of Smithtown, New York has 5 ZIP codes: 5 for street addresses (, , , and ).
Your street decides which one you use.
Which Town of Smithtown ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Town of Smithtown ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Town of Smithtown town limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and county subdivision limits (2024).
All Town of Smithtown ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 11725 | street delivery; mail may be addressed to Commack Commack |
| 11754 | street delivery; mail may be addressed to Kings Park Kings Park |
| 11767 | street delivery; mail may be addressed to Nesconset Nesconset |
| 11780 | street delivery; mail may be addressed to Saint James Saint James |
| 11787 | street delivery Smithtown |
ZIP codes from nearby towns that reach into Town of Smithtown
- 11768, mailing town Northport, covers 7 percent of Town of Smithtown
- 11788, mailing town Hauppauge, covers 7 percent of Town of Smithtown
Why your mail may say Town of Smithtown when you live outside it
Town of Smithtown ZIP codes also cover Smithtown, Commack and Kings Park, so a letter addressed to Town of Smithtown can go to a home outside the town limits.
The reverse happens too: parts of Town of Smithtown use 11768 and 11788, which mail under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Suffolk County property records show which city you are in.
Town of Smithtown ZIP code questions
What is the main ZIP code for Town of Smithtown?
11787, the ZIP code of the main Smithtown post office at 25 Route 111.
What county is Town of Smithtown in?
Suffolk County.
ZIP codes for towns near Town of Smithtown
More towns near Town of Smithtown: Huntington Station, Bay Shore, Town of Islip, West Babylon, Norwalk, Fairfield, Bridgeport, Town of Oyster Bay, Stratford.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections