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/YOUNGEST

ZIP Codes With the Youngest Population in Pennsylvania

What this measures. Median age of residents, lowest first. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 19367 Pomeroy Chester 7.5
2 15492 Wickhaven Fayette 11.3
3 17835 Laurelton Union 12.0
4 16140 New Bedford Lawrence 16.7
5 17750 Mackeyville Clinton 17.4
6 15691 Wendel Westmoreland 17.5
7 19545 New Berlinville Berks 18.6
8 16802 University Park Centre 19.2
9 15760 Marsteller Cambria 19.3
10 15705 Indiana Indiana 19.5
11 16546 Erie Erie 19.6
12 19383 West Chester Chester 19.6
13 15334 Garards Fort Greene 19.8
14 16444 Edinboro Erie 19.8
15 16256 Smicksburg Indiana 20.1
16 16563 Erie Erie 20.1
17 16172 New Wilmington Lawrence 20.4
18 17027 Grantham Cumberland 20.6
19 17505 Bird In Hand Lancaster 20.6
20 15282 Pittsburgh Allegheny 20.7
21 19085 Villanova Delaware 20.7
22 19345 Immaculata Chester 20.7
23 15213 Pittsburgh Allegheny 20.8
24 19374 Toughkenamon Chester 21.1
25 16211 Beyer Indiana 21.2
26 15275 Pittsburgh Allegheny 21.4
27 15419 California Washington 21.5
28 17054 Mattawana Mifflin 21.6
29 19437 Gwynedd Valley Montgomery 21.7
30 19319 Cheyney Delaware 21.9
31 18333 Kresgeville Monroe 22.2
32 16682 Sproul Blair 22.6
33 17535 Kinzers Lancaster 22.6
34 15929 Dilltown Indiana 22.8
35 17010 Campbelltown Lebanon 22.9
36 15847 Knox Dale Jefferson 23.0
37 17551 Millersville Lancaster 23.1
38 18701 Wilkes Barre Luzerne 23.1
39 16694 Wood Huntingdon 23.3
40 17093 Summerdale Cumberland 23.6
41 19104 Philadelphia Philadelphia 23.8
42 15444 Hiller Fayette 24.1
43 16035 Forestville Butler 24.1
44 19530 Kutztown Berks 24.6
45 15454 Leckrone Fayette 24.7
46 17779 Woolrich Clinton 25.0
47 16434 Spartansburg Crawford 25.1
48 17840 Locust Gap Northumberland 25.3
49 16820 Aaronsburg Centre 25.6
50 15472 Oliver Fayette 25.9

Showing the top 50 of 1,799 ZIP codes in Pennsylvania that have this figure . 19367 ranks 1st at 7.5, against 25.9 in 50th place.

Other rankings for Pennsylvania

Cite this page

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

Underlying data is public domain or openly licensed — sources, vintages and licences.