ZIP Code 01966 — Rockport, MA
01966 is a standard (street delivery) ZIP code serving Rockport, Massachusetts, in Essex County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 01966 at a glance
| ZIP code | 01966 |
|---|---|
| Primary city | Rockport |
| State | Massachusetts (MA) |
| County | Essex FIPS 25009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 7,009 |
| Coordinates | 42.654320, -70.622270 |
How ZIP+4 works in 01966
The four digits after the hyphen encode a delivery segment inside 01966. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 01966 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 01966.
| ZIP | City | Distance |
|---|---|---|
| 01930 | Gloucester, MA | 3.9 mi |
| 01929 | Essex, MA | 8 mi |
| 01944 | Manchester, MA | 8.9 mi |
| 01938 | Ipswich, MA | 11.3 mi |
| 01982 | South Hamilton, MA | 12.1 mi |
| 01965 | Prides Crossing, MA | 12.3 mi |
| 01915 | Beverly, MA | 13.7 mi |
| 01984 | Wenham, MA | 13.7 mi |
| 01969 | Rowley, MA | 14.3 mi |
| 01951 | Newbury, MA | 14.4 mi |
| 01983 | Topsfield, MA | 16.3 mi |
| 01945 | Marblehead, MA | 16.3 mi |
Questions about 01966
What is the ZIP+4 code for 01966?
01966 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 01966, you need to look up a specific street address to get them.
What city is 01966?
01966 is assigned to Rockport, Massachusetts, in Essex County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.