100 Largest ZIP Codes in the United States by Population in Washington County, Maryland

Explore the 100 largest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Washington County, Maryland.

Rank	ZIP Code	City	State	Population
1	21740	HAGERSTOWN	MD	62,760
2	21742	HAGERSTOWN	MD	34,549
3	21713	BOONSBORO	MD	9,999
4	21783	SMITHSBURG	MD	9,866
5	21795	WILLIAMSPORT	MD	9,772
6	21722	CLEAR SPRING	MD	6,709
7	21782	SHARPSBURG	MD	4,389
8	21750	HANCOCK	MD	3,613
9	21756	KEEDYSVILLE	MD	3,303
10	21746	HAGERSTOWN	MD	2,613
11	21779	ROHRERSVILLE	MD	1,731
12	21733	FAIRPLAY	MD	1,202
13	21719	CASCADE	MD	1,145
14	21767	MAUGANSVILLE	MD	873
15	21711	BIG POOL	MD	864
16	21734	FUNKSTOWN	MD	861
17	21781	SAINT JAMES	MD	41
18	21715	BROWNSVILLE	MD	12