ZIP Code 04855 — Port Clyde, ME
04855 is a standard (street delivery) ZIP code serving Port Clyde, Maine, in Knox 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 04855 at a glance
| ZIP code | 04855 |
|---|---|
| Primary city | Port Clyde |
| State | Maine (ME) |
| County | Knox FIPS 23013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 313 |
| Coordinates | 43.937970, -69.269580 |
How ZIP+4 works in 04855
The four digits after the hyphen encode a delivery segment inside 04855. 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 04855 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 04855.
| ZIP | City | Distance |
|---|---|---|
| 04860 | Tenants Harbor, ME | 2.9 mi |
| 04547 | Friendship, ME | 4.8 mi |
| 04563 | Cushing, ME | 5.4 mi |
| 04859 | Spruce Head, ME | 6.9 mi |
| 04551 | Bremen, ME | 9.1 mi |
| 04858 | South Thomaston, ME | 9.7 mi |
| 04564 | Round Pond, ME | 9.9 mi |
| 04541 | Chamberlain, ME | 11.2 mi |
| 04854 | Owls Head, ME | 11.7 mi |
| 04861 | Thomaston, ME | 11.7 mi |
| 04539 | Bristol, ME | 11.8 mi |
| 04852 | Monhegan, ME | 12.1 mi |
Questions about 04855
What is the ZIP+4 code for 04855?
04855 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 04855, you need to look up a specific street address to get them.
What city is 04855?
04855 is assigned to Port Clyde, Maine, in Knox 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.