Most populated ZIP codes in Maryland

The ZIP codes in Maryland with the most residents.

Rank	ZIP code	City	County	Population	Population
1	20906	Silver Spring, MD	Montgomery County	70,595	70,595
2	21234	Parkville, MD	Baltimore County	66,334	66,334
3	20878	Gaithersburg, MD	Montgomery County	66,115	66,115
4	21740	Hagerstown, MD	Washington County	64,792	64,792
5	21117	Owings Mills, MD	Baltimore County	62,816	62,816
6	20874	Germantown, MD	Montgomery County	62,738	62,738
7	21122	Pasadena, MD	Anne Arundel County	61,566	61,566
8	21222	Dundalk, MD	Baltimore County	59,407	59,407
9	20904	Silver Spring, MD	Montgomery County	58,646	58,646
10	21061	Glen Burnie, MD	Anne Arundel County	57,230	57,230
11	20744	Fort Washington, MD	Prince George's County	54,441	54,441
12	20772	Upper Marlboro, MD	Prince George's County	54,319	54,319
13	20902	Silver Spring, MD	Montgomery County	54,261	54,261
14	21215	Baltimore, MD	Baltimore city	52,229	52,229
15	20774	Upper Marlboro, MD	Prince George's County	51,816	51,816
16	20854	Potomac, MD	Montgomery County	50,498	50,498
17	21228	Catonsville, MD	Baltimore County	50,492	50,492
18	20850	Rockville, MD	Montgomery County	50,353	50,353
19	20783	Hyattsville, MD	Prince George's County	50,333	50,333
20	21702	Frederick, MD	Frederick County	49,605	49,605
21	21206	Baltimore, MD	Baltimore city	48,902	48,902
22	21043	Ellicott City, MD	Howard County	48,525	48,525
23	20852	Rockville, MD	Montgomery County	48,180	48,180
24	21224	Baltimore, MD	Baltimore city	47,465	47,465
25	21207	Gwynn Oak, MD	Baltimore County	47,099	47,099
26	21229	Baltimore, MD	Baltimore city	46,679	46,679
27	20910	Silver Spring, MD	Montgomery County	45,943	45,943
28	21921	Elkton, MD	Cecil County	45,527	45,527
29	21044	Columbia, MD	Howard County	44,114	44,114
30	21218	Baltimore, MD	Baltimore city	44,014	44,014
31	21221	Essex, MD	Baltimore County	43,487	43,487
32	21042	Ellicott City, MD	Howard County	43,327	43,327
33	21701	Frederick, MD	Frederick County	43,048	43,048
34	21220	Middle River, MD	Baltimore County	42,824	42,824
35	20706	Lanham, MD	Prince George's County	42,612	42,612
36	21703	Frederick, MD	Frederick County	41,960	41,960
37	20743	Capitol Heights, MD	Prince George's County	41,093	41,093
38	21502	Cumberland, MD	Allegany County	41,015	41,015
39	21804	Salisbury, MD	Wicomico County	40,430	40,430
40	20748	Temple Hills, MD	Prince George's County	40,338	40,338
41	20785	Hyattsville, MD	Prince George's County	40,066	40,066
42	21045	Columbia, MD	Howard County	40,034	40,034
43	21060	Glen Burnie, MD	Anne Arundel County	39,730	39,730
44	21236	Nottingham, MD	Baltimore County	39,514	39,514
45	21784	Sykesville, MD	Carroll County	39,258	39,258
46	21093	Lutherville Timonium, MD	Baltimore County	39,100	39,100
47	21157	Westminster, MD	Carroll County	38,984	38,984
48	21014	Bel Air, MD	Harford County	38,707	38,707
49	21401	Annapolis, MD	Anne Arundel County	38,629	38,629
50	20877	Gaithersburg, MD	Montgomery County	38,546	38,546

Source: American Community Survey 2020–2024 5-year estimates. Only ZIP codes with a delivery area are ranked. Methodology

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Most populated ZIP codes in Maryland

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