Old Mastic zip code
Zip code in Old Mastic, NY
The location Old Mastic belongs to Suffolk County, state of New York. Old Mastic has been assigned with the zip code 11951.
The location name Old Mastic is listed as unacceptable by the US Postal Service so any mailing should avoid it. Instead you can use Mastic Beach, the official name of the location.
| Zip code | Type | Population |
|---|---|---|
| 11951 | STANDARD | 12,110 |
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