ZIP Code 19003 — Ardmore, PA
19003 is a standard (street delivery) ZIP code serving Ardmore, Pennsylvania, in Delaware 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 19003 at a glance
| ZIP code | 19003 |
|---|---|
| Primary city | Ardmore |
| State | Pennsylvania (PA) |
| County | Delaware FIPS 42045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 14,255 |
| Coordinates | 40.002170, -75.298410 |
How ZIP+4 works in 19003
The four digits after the hyphen encode a delivery segment inside 19003. 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 19003 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 19003.
| ZIP | City | Distance |
|---|---|---|
| 19041 | Haverford, PA | 1.1 mi |
| 19096 | Wynnewood, PA | 1.3 mi |
| 19083 | Havertown, PA | 1.9 mi |
| 19010 | Bryn Mawr, PA | 2.2 mi |
| 19066 | Merion Station, PA | 2.6 mi |
| 19072 | Narberth, PA | 2.7 mi |
| 19151 | Philadelphia, PA | 2.9 mi |
| 19082 | Upper Darby, PA | 3.2 mi |
| 19035 | Gladwyne, PA | 3.3 mi |
| 19085 | Villanova, PA | 3.6 mi |
| 19026 | Drexel Hill, PA | 3.6 mi |
| 19004 | Bala Cynwyd, PA | 3.7 mi |
Questions about 19003
What is the ZIP+4 code for 19003?
19003 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 19003, you need to look up a specific street address to get them.
What city is 19003?
19003 is assigned to Ardmore, Pennsylvania, in Delaware 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.