ZIP Code 21787 — Taneytown, MD
21787 is a standard (street delivery) ZIP code serving Taneytown, Maryland, in Carroll 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 21787 at a glance
| ZIP code | 21787 |
|---|---|
| Primary city | Taneytown |
| State | Maryland (MD) |
| County | Carroll FIPS 24013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 11,645 |
| Coordinates | 39.671690, -77.173170 |
How ZIP+4 works in 21787
The four digits after the hyphen encode a delivery segment inside 21787. 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 21787 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 21787.
| ZIP | City | Distance |
|---|---|---|
| 17340 | Littlestown, PA | 6.6 mi |
| 21757 | Keymar, MD | 6.8 mi |
| 21158 | Westminster, MD | 7.7 mi |
| 21727 | Emmitsburg, MD | 8.5 mi |
| 21791 | Union Bridge, MD | 8.9 mi |
| 21778 | Rocky Ridge, MD | 9.5 mi |
| 17325 | Gettysburg, PA | 11.1 mi |
| 21776 | New Windsor, MD | 11.2 mi |
| 21798 | Woodsboro, MD | 11.4 mi |
| 17344 | Mcsherrystown, PA | 12.3 mi |
| 17331 | Hanover, PA | 13.1 mi |
| 21157 | Westminster, MD | 13.2 mi |
Questions about 21787
What is the ZIP+4 code for 21787?
21787 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 21787, you need to look up a specific street address to get them.
What city is 21787?
21787 is assigned to Taneytown, Maryland, in Carroll 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.