Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — RANKINGS/MD/OLDEST

ZIP Codes With the Oldest Population in Maryland

What this measures. Median age of residents, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 21675 Wingate Dorchester 75.1
2 21705 Frederick Frederick 73.5
3 20687 Scotland St. Mary's 73.1
4 21653 Newcomb Talbot 72.7
5 21627 Crocheron Dorchester 72.3
6 21612 Bozman Talbot 70.2
7 21902 Perry Point Cecil 70.2
8 21810 Allen Wicomico 69.9
9 21676 Wittman Talbot 69.6
10 21679 Wye Mills Talbot 69.5
11 21654 Oxford Talbot 68.7
12 21652 Neavitt Talbot 68.5
13 21930 Georgetown Cecil 68.1
14 21865 Tyaskin Wicomico 67.6
15 21056 Gibson Island Anne Arundel 66.6
16 21715 Brownsville Washington 66.5
17 21153 Stevenson Baltimore 65.8
18 20626 Coltons Point St. Mary's 64.5
19 21405 Annapolis Anne Arundel 64.5
20 21644 Ingleside Queen Anne's 64.5
21 20612 Benedict Charles 63.8
22 20688 Solomons Calvert 63.8
23 20621 Chaptico St. Mary's 63.0
24 21814 Bivalve Wicomico 62.9
25 20899 Gaithersburg Montgomery 62.8
26 20880 Washington Grove Montgomery 62.2
27 21648 Madison Dorchester 61.4
28 21835 Linkwood Dorchester 60.8
29 21672 Toddville Dorchester 60.6
30 21866 Tylerton Somerset 60.6
31 21665 Sherwood Talbot 60.4
32 21871 Westover Somerset 60.2
33 21667 Still Pond Kent 59.5
34 21829 Girdletree Worcester 59.5
35 20609 Avenue St. Mary's 59.3
36 21645 Kennedyville Kent 59.2
37 20692 Valley Lee St. Mary's 59.1
38 21641 Hillsboro Caroline 58.8
39 20615 Broomes Island Calvert 58.6
40 21714 Braddock Heights Frederick 58.6
41 21657 Queen Anne Queen Anne's 58.5
42 21661 Rock Hall Kent 58.4
43 21778 Rocky Ridge Frederick 58.4
44 21669 Taylors Island Dorchester 58.3
45 21912 Warwick Cecil 58.2
46 20629 Dowell Calvert 58.1
47 21718 Burkittsville Frederick 57.6
48 20779 Tracys Landing Anne Arundel 57.1
49 21561 Swanton Garrett 57.0
50 21624 Claiborne Talbot 57.0

Showing the top 50 of 464 ZIP codes in Maryland that have this figure . 21675 ranks 1st at 75.1, against 57.0 in 50th place.

Other rankings for Maryland

Cite this page

zipcodes.pro. “ZIP Codes With the Oldest Population in Maryland.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/md/oldest

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