There are 10 United States Postal Service post boxes available to the public in zip code 21742. 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 21742 zip code.

Mailboxes in Nearby Zip Codes

Public Collection Box
11110 Medical Campus Rd
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Public Collection Box
11365 Robinwood Dr
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Public Collection Box
1410 Kensington Dr
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Public Collection Box
925 Pennsylvania Ave
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Public Collection Box
1101 Oak Hill Ave
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Public Collection Box
12912 Conamar Dr
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Public Collection Box
1519 Potomac Ave
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Public Collection Box
1500 Pennsylvania Ave
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Public Collection Box
13206 Fountain Head Plz
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Public Collection Box
1240 Glenwood Ave
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