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Post Offices by County

HOWARD COUNTY, MARYLAND

ZIP Code Post Office Date Established Date Discontinued
20701 ANNAPOLIS JUNCTION
21029 CLARKSVILLE
21045 COLUMBIA 08/29/1977
21723 COOKSVILLE 09/28/2002
21036 DAYTON 07/21/1864
ELKRIDGE 10/12/1825 01/17/1896
21043 ELLICOTT CITY
20759 FULTON 12/29/1874
21737 GLENELG
21738 GLENWOOD
20777 HIGHLAND 12/29/1874
21083 ILCHESTER
21765 LISBON
MARRIOTTSVILLE 02/20/1832 04/30/1964
20763 SAVAGE
21150 SIMPSONVILLE
21794 WEST FRIENDSHIP
21163 WOODSTOCK

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