ZIP Code 21776 — New Windsor, MD
21776 is a standard (street delivery) ZIP code serving New Windsor, 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 21776 at a glance
| ZIP code | 21776 |
|---|---|
| Primary city | New Windsor |
| State | Maryland (MD) |
| County | Carroll FIPS 24013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 6,261 |
| Coordinates | 39.518610, -77.103760 |
How ZIP+4 works in 21776
The four digits after the hyphen encode a delivery segment inside 21776. 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 21776 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 21776.
| ZIP | City | Distance |
|---|---|---|
| 21791 | Union Bridge, MD | 4.7 mi |
| 21157 | Westminster, MD | 6.8 mi |
| 21762 | Libertytown, MD | 8.1 mi |
| 21771 | Mount Airy, MD | 9 mi |
| 21158 | Westminster, MD | 9.6 mi |
| 21757 | Keymar, MD | 10 mi |
| 21048 | Finksburg, MD | 10.4 mi |
| 21798 | Woodsboro, MD | 10.5 mi |
| 21784 | Sykesville, MD | 10.7 mi |
| 21787 | Taneytown, MD | 11.2 mi |
| 21774 | New Market, MD | 12 mi |
| 21797 | Woodbine, MD | 12.9 mi |
Questions about 21776
What is the ZIP+4 code for 21776?
21776 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 21776, you need to look up a specific street address to get them.
What city is 21776?
21776 is assigned to New Windsor, 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.