ZIP Code 21663 — Saint Michaels, MD
21663 is a standard (street delivery) ZIP code serving Saint Michaels, Maryland, in Talbot 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 21663 at a glance
| ZIP code | 21663 |
|---|---|
| Primary city | Saint Michaels |
| State | Maryland (MD) |
| County | Talbot FIPS 24041 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,764 |
| Coordinates | 38.783330, -76.233030 |
How ZIP+4 works in 21663
The four digits after the hyphen encode a delivery segment inside 21663. 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 21663 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 21663.
| ZIP | City | Distance |
|---|---|---|
| 21647 | Mcdaniel, MD | 3 mi |
| 21612 | Bozman, MD | 3.3 mi |
| 21676 | Wittman, MD | 3.9 mi |
| 21653 | Newcomb, MD | 3.9 mi |
| 21624 | Claiborne, MD | 4.1 mi |
| 21662 | Royal Oak, MD | 5.1 mi |
| 21652 | Neavitt, MD | 5.1 mi |
| 21665 | Sherwood, MD | 6.4 mi |
| 21671 | Tilghman, MD | 8.1 mi |
| 21601 | Easton, MD | 8.1 mi |
| 21654 | Oxford, MD | 8.6 mi |
| 21638 | Grasonville, MD | 11.3 mi |
Questions about 21663
What is the ZIP+4 code for 21663?
21663 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 21663, you need to look up a specific street address to get them.
What city is 21663?
21663 is assigned to Saint Michaels, Maryland, in Talbot 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.