Riverhead zipcode
| City | Riverhead |
| ZIP Code | 11901 |
| Type | Standard |
| State Code | NY |
| State | New York |
ZIP code of Riverhead is 11901. This place is located in New York state in US. To send any postal service to Riverhead, you must use 11901 zipcode.
The ZIP code 11901 is also used with 1 more city name of New York.
- Flanders, NY
You should avoid following 1 city name of New York to be used with the ZIP code 11901.
- Northampton, NY