ZIP Code 19033 — Folsom, PA
19033 is a standard (street delivery) ZIP code serving Folsom, 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 19033 at a glance
| ZIP code | 19033 |
|---|---|
| Primary city | Folsom |
| State | Pennsylvania (PA) |
| County | Delaware FIPS 42045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 8,261 |
| Coordinates | 39.890770, -75.328920 |
How ZIP+4 works in 19033
The four digits after the hyphen encode a delivery segment inside 19033. 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 19033 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 19033.
| ZIP | City | Distance |
|---|---|---|
| 19081 | Swarthmore, PA | 1.1 mi |
| 19070 | Morton, PA | 1.1 mi |
| 19076 | Prospect Park, PA | 1.2 mi |
| 19043 | Holmes, PA | 1.3 mi |
| 19078 | Ridley Park, PA | 1.3 mi |
| 19094 | Woodlyn, PA | 1.4 mi |
| 19074 | Norwood, PA | 1.7 mi |
| 19036 | Glenolden, PA | 2.1 mi |
| 19022 | Crum Lynne, PA | 2.2 mi |
| 19086 | Wallingford, PA | 2.2 mi |
| 19029 | Essington, PA | 2.7 mi |
| 19032 | Folcroft, PA | 2.8 mi |
Questions about 19033
What is the ZIP+4 code for 19033?
19033 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 19033, you need to look up a specific street address to get them.
What city is 19033?
19033 is assigned to Folsom, 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.