Town Chart.

← Look up another ZIP code · All towns in New York

ZIP code 11787

Smithtown, NY · Suffolk County

About ZIP code 11787

  • ZIP code 11787 is in Smithtown, Suffolk County, New York.
  • About 34,499 people live in it, which is 894 people per square mile.
  • Time zone: Eastern Standard Time.
  • The middle of the ZIP code is at 40.853, -73.211.

A ZIP code is a mail delivery area, not a town border, and one ZIP code can cover parts of several towns. To check a single address, use the US Postal Service lookup.

Smithtown, NY

ZIP code 11787 is the post office name for Smithtown, NY. 24,375 people live in Smithtown. Typical household income is $150,664. A typical home costs $704,700.

  • Stronger than most towns on: Long, healthy lives, Home internet and working from home and Dining and entertainment.
  • Weaker than most towns on: Cost of living, Short commute and Property taxes.

See all figures for Smithtown

Nearby ZIP codes

ZIP code list from SimpleMaps US Zips. Population is a US Census Bureau estimate. These are estimates, so check official sources before you decide.