There are 5 United States Postal Service post boxes available to the public in zip code 21738. 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 21738 zip code.

Public Collection Box
3000 Washington Rd Rt 97
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Public Collection Box
2465 Route 97
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Public Collection Box
3900 10 Oaks Rd Unit 7
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Public Collection Box
4924 A Ten Oaks Rd
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Public Collection Box
12800 Route 144
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Mailboxes in Nearby Zip Codes