Cortlandt, NY ZIP Codes
Cortlandt, New York has 4 ZIP codes: 4 for street addresses (, , and ).
Your street decides which one you use.
Which Cortlandt 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?
Cortlandt ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Cortlandt town limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and county subdivision limits (2024).
All Cortlandt ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 10511 | street delivery; mail may be addressed to Buchanan Buchanan |
| 10520 | street delivery; mail may be addressed to Croton On Hudson Croton On Hudson |
| 10548 | street delivery; mail may be addressed to Montrose Montrose |
| 10567 | street delivery; mail may be addressed to Cortlandt Manor Peekskill |
Why your mail may say Cortlandt when you live outside it
Cortlandt ZIP codes also cover Croton-on-Hudson, Montrose and Buchanan, so a letter addressed to Cortlandt can go to a home outside the town limits.
A ZIP code does not set your city, school district or tax. Westchester County property records show which city you are in.
Cortlandt ZIP code questions
What is the main ZIP code for Cortlandt?
10511, the ZIP code of the main Buchanan post office at 252 Tate Ave.
What county is Cortlandt in?
Westchester County.
ZIP codes for towns near Cortlandt
More towns near Cortlandt: Spring Valley, Ramapo, Town of Carmel, Orangetown, Greenburgh, White Plains, Town of Greenwich, Town of Rye, Port Chester.
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