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/PA/OLDEST

ZIP Codes With the Oldest Population in Pennsylvania

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 17606 Lancaster Lancaster 91.1
2 17943 Lavelle Schuylkill 89.4
3 15488 Waltersburg Fayette 85.6
4 19436 Gwynedd Montgomery 85.5
5 17247 Quincy Franklin 82.4
6 15624 Crabtree Westmoreland 82.0
7 16856 Mingoville Centre 81.8
8 16155 Villa Maria Lawrence 79.9
9 15502 Hidden Valley Somerset 79.8
10 17933 Friedensburg Schuylkill 75.1
11 19492 Zieglerville Montgomery 74.4
12 16837 Glen Richey Clearfield 73.4
13 17504 Bausman Lancaster 72.4
14 15350 Muse Washington 71.3
15 15638 Hostetter Westmoreland 71.3
16 15861 Sinnamahoning Cameron 71.3
17 17727 Cedar Run Tioga 70.9
18 15763 Northpoint Indiana 70.4
19 16321 East Hickory Forest 70.3
20 18070 Palm Montgomery 70.1
21 15348 Millsboro Washington 69.9
22 17016 Cornwall Lebanon 69.8
23 15777 Starford Indiana 69.4
24 18454 Poyntelle Wayne 69.3
25 15776 Sprankle Mills Jefferson 69.2
26 17769 Slate Run Lycoming 68.5
27 19474 Skippack Montgomery 68.5
28 17581 Terre Hill Lancaster 68.3
29 15712 Arcadia Indiana 68.2
30 16217 Cooksburg Forest 68.2
31 17886 West Milton Union 67.9
32 18212 Ashfield Carbon 67.9
33 15565 West Salisbury Somerset 67.8
34 18357 Skytop Monroe 67.7
35 18950 Point Pleasant Bucks 67.7
36 18012 Aquashicola Carbon 67.5
37 15622 Champion Fayette 67.1
38 15616 Armbrust Westmoreland 67.0
39 19511 Bowers Berks 66.7
40 18933 Lumberville Bucks 66.6
41 16422 Harmonsburg Crawford 66.4
42 15366 Van Voorhis Washington 66.2
43 18626 Laporte Sullivan 66.0
44 18435 Lackawaxen Pike 65.9
45 17742 Lairdsville Lycoming 65.8
46 18323 Buck Hill Falls Monroe 65.8
47 18234 Lattimer Mines Luzerne 65.4
48 18241 Nuremberg Luzerne 65.3
49 16733 Hazel Hurst McKean 65.2
50 17739 Jersey Mills Lycoming 65.1

Showing the top 50 of 1,799 ZIP codes in Pennsylvania that have this figure . 17606 ranks 1st at 91.1, against 65.1 in 50th place.

Other rankings for Pennsylvania

Cite this page

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

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