ZIP Code 21557 — Rawlings, MD
21557 is a standard (street delivery) ZIP code serving Rawlings, Maryland, in Allegany 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 21557 at a glance
| ZIP code | 21557 |
|---|---|
| Primary city | Rawlings |
| State | Maryland (MD) |
| County | Allegany FIPS 24001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,481 |
| Coordinates | 39.519100, -78.923530 |
How ZIP+4 works in 21557
The four digits after the hyphen encode a delivery segment inside 21557. 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 21557 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 21557.
| ZIP | City | Distance |
|---|---|---|
| 21542 | Midland, MD | 5.2 mi |
| 21562 | Westernport, MD | 6.8 mi |
| 21521 | Barton, MD | 7 mi |
| 26750 | Piedmont, WV | 7.1 mi |
| 21539 | Lonaconing, MD | 7.2 mi |
| 26753 | Ridgeley, WV | 7.6 mi |
| 21540 | Luke, MD | 7.8 mi |
| 26719 | Fort Ashby, WV | 8.4 mi |
| 26726 | Keyser, WV | 8.5 mi |
| 21543 | Midlothian, MD | 8.7 mi |
| 21523 | Bloomington, MD | 8.7 mi |
| 21532 | Frostburg, MD | 9.6 mi |
Questions about 21557
What is the ZIP+4 code for 21557?
21557 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 21557, you need to look up a specific street address to get them.
What city is 21557?
21557 is assigned to Rawlings, Maryland, in Allegany 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.