ZIP Code 19544 — Mount Aetna, PA
19544 is a standard (street delivery) ZIP code serving Mount Aetna, Pennsylvania, in Berks 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 19544 at a glance
| ZIP code | 19544 |
|---|---|
| Primary city | Mount Aetna |
| State | Pennsylvania (PA) |
| County | Berks FIPS 42011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 199 |
| Coordinates | 40.416690, -76.296190 |
How ZIP+4 works in 19544
The four digits after the hyphen encode a delivery segment inside 19544. 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 19544 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 19544.
| ZIP | City | Distance |
|---|---|---|
| 17087 | Richland, PA | 1.9 mi |
| 17067 | Myerstown, PA | 2.2 mi |
| 19550 | Rehrersburg, PA | 3.6 mi |
| 19567 | Womelsdorf, PA | 4.8 mi |
| 19507 | Bethel, PA | 5.3 mi |
| 17046 | Lebanon, PA | 7.4 mi |
| 19559 | Strausstown, PA | 7.8 mi |
| 17088 | Schaefferstown, PA | 8 mi |
| 17026 | Fredericksburg, PA | 8.1 mi |
| 17073 | Newmanstown, PA | 8.3 mi |
| 17039 | Kleinfeltersville, PA | 9 mi |
| 19551 | Robesonia, PA | 9 mi |
Questions about 19544
What is the ZIP+4 code for 19544?
19544 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 19544, you need to look up a specific street address to get them.
What city is 19544?
19544 is assigned to Mount Aetna, Pennsylvania, in Berks 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.