About ZIP code 21640
The ZIP code 21640 routes mail to Henderson in the Maryland region of United States. Use it as the postal segment of any address in this area, and confirm unusual addresses with the local postal operator.
United States ยท ZIP code
21640 - Henderson
ZIP code 21640 is Henderson in Maryland, United States.
| ZIP code | 21640 |
| Place | Henderson |
| Region | Maryland |
| District | Caroline |
| Country | United States (US) |
| Coordinates | 39.0672, -75.7948 (map) |