ZIP Code 19090 — Willow Grove, PA
19090 is a standard (street delivery) ZIP code serving Willow Grove, Pennsylvania, in Montgomery 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 19090 at a glance
| ZIP code | 19090 |
|---|---|
| Primary city | Willow Grove |
| State | Pennsylvania (PA) |
| County | Montgomery FIPS 42091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 19,662 |
| Coordinates | 40.148400, -75.123780 |
How ZIP+4 works in 19090
The four digits after the hyphen encode a delivery segment inside 19090. 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 19090 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 19090.
| ZIP | City | Distance |
|---|---|---|
| 19001 | Abington, PA | 1.5 mi |
| 19025 | Dresher, PA | 2.1 mi |
| 19040 | Hatboro, PA | 2.2 mi |
| 19044 | Horsham, PA | 3.2 mi |
| 19009 | Bryn Athyn, PA | 3.3 mi |
| 19006 | Huntingdon Valley, PA | 3.4 mi |
| 19046 | Jenkintown, PA | 3.4 mi |
| 19038 | Glenside, PA | 4.1 mi |
| 19075 | Oreland, PA | 4.2 mi |
| 19034 | Fort Washington, PA | 4.6 mi |
| 19095 | Wyncote, PA | 4.6 mi |
| 19002 | Ambler, PA | 5.2 mi |
Questions about 19090
What is the ZIP+4 code for 19090?
19090 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 19090, you need to look up a specific street address to get them.
What city is 19090?
19090 is assigned to Willow Grove, Pennsylvania, in Montgomery 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.