There are 22 United States Postal Service post boxes available to the public in zip code 21231. For additional collection boxes in neighboring communities, see the list of post boxes in Maryland.

Are you looking for a post office? See the list of post offices in the 21231 zip code.

Mailboxes in Nearby Zip Codes

Public Collection Box
403 N Caroline St
Directions
Public Collection Box
244 N Patterson Park Ave
Directions
Public Collection Box
2100 E Baltimore St
Directions
Public Collection Box
1704 Gough St
Directions
Public Collection Box
245 S Wolfe St
Directions
Public Collection Box
1900 Bank St
Directions
Public Collection Box
501 S Broadway
Directions
Public Collection Box
1933 Eastern Ave
Directions
Public Collection Box
100 S Washington St
Directions
Public Collection Box
6 S Wolfe St
Directions
Public Collection Box
2056 Bank St
Directions
Public Collection Box
1 N Broadway
Directions
Public Collection Box
300 S Collington Ave
Directions
Public Collection Box
701 S Broadway
Directions
Public Collection Box
700 S Ann St
Directions
Public Collection Box
714 S Wolfe St
Directions
Public Collection Box
2240 Eastern Ave
Directions
Public Collection Box
1800 Thames St
Directions
Public Collection Box
2200 Boston St
Directions
Public Collection Box
1900 Thames St
Directions
Public Collection Box
1615 Thames St
Directions
Public Collection Box
930 S Wolfe St
Directions