ZIP Code 18977 — Washington Crossing, PA
18977 is a standard (street delivery) ZIP code serving Washington Crossing, Pennsylvania, in Bucks 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 18977 at a glance
| ZIP code | 18977 |
|---|---|
| Primary city | Washington Crossing |
| State | Pennsylvania (PA) |
| County | Bucks FIPS 42017 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,569 |
| Coordinates | 40.286550, -74.878650 |
How ZIP+4 works in 18977
The four digits after the hyphen encode a delivery segment inside 18977. 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 18977 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 18977.
| ZIP | City | Distance |
|---|---|---|
| 08560 | Titusville, NJ | 2.2 mi |
| 08628 | Trenton, NJ | 3.3 mi |
| 18940 | Newtown, PA | 4 mi |
| 08534 | Pennington, NJ | 5.4 mi |
| 08618 | Trenton, NJ | 5.5 mi |
| 08530 | Lambertville, NJ | 6 mi |
| 08638 | Trenton, NJ | 6.5 mi |
| 18946 | Pineville, PA | 6.9 mi |
| 18980 | Wycombe, PA | 7 mi |
| 19067 | Morrisville, PA | 7.2 mi |
| 19047 | Langhorne, PA | 7.4 mi |
| 08608 | Trenton, NJ | 7.5 mi |
Questions about 18977
What is the ZIP+4 code for 18977?
18977 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 18977, you need to look up a specific street address to get them.
What city is 18977?
18977 is assigned to Washington Crossing, Pennsylvania, in Bucks 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.