ZIP Code 02645 — Harwich, MA
02645 is a standard (street delivery) ZIP code serving Harwich, Massachusetts, in Barnstable 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 02645 at a glance
| ZIP code | 02645 |
|---|---|
| Primary city | Harwich |
| State | Massachusetts (MA) |
| County | Barnstable FIPS 25001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 11,288 |
| Coordinates | 41.703520, -70.062150 |
How ZIP+4 works in 02645
The four digits after the hyphen encode a delivery segment inside 02645. 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 02645 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 02645.
| ZIP | City | Distance |
|---|---|---|
| 02646 | Harwich Port, MA | 2.3 mi |
| 02659 | South Chatham, MA | 2.5 mi |
| 02631 | Brewster, MA | 3 mi |
| 02671 | West Harwich, MA | 3.4 mi |
| 02639 | Dennis Port, MA | 4.6 mi |
| 02633 | Chatham, MA | 4.6 mi |
| 02660 | South Dennis, MA | 4.8 mi |
| 02650 | North Chatham, MA | 5 mi |
| 02641 | East Dennis, MA | 5.7 mi |
| 02670 | West Dennis, MA | 6.4 mi |
| 02653 | Orleans, MA | 6.4 mi |
| 02664 | South Yarmouth, MA | 7.1 mi |
Questions about 02645
What is the ZIP+4 code for 02645?
02645 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 02645, you need to look up a specific street address to get them.
What city is 02645?
02645 is assigned to Harwich, Massachusetts, in Barnstable 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.