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/SMALLEST-AREA

Smallest ZIP Codes in Pennsylvania by Land Area

What this measures. Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 19109 Philadelphia Philadelphia 0.00 sq mi
2 18627 Lehman Luzerne 0.01 sq mi
3 19108 Philadelphia Philadelphia 0.01 sq mi
4 16550 Erie Erie 0.01 sq mi
5 18012 Aquashicola Carbon 0.01 sq mi
6 18195 Allentown Lehigh 0.01 sq mi
7 18046 East Texas Lehigh 0.02 sq mi
8 17504 Bausman Lancaster 0.02 sq mi
9 17010 Campbelltown Lebanon 0.02 sq mi
10 17507 Bowmansville Lancaster 0.02 sq mi
11 19545 New Berlinville Berks 0.02 sq mi
12 17232 Lurgan Franklin 0.02 sq mi
13 15847 Knox Dale Jefferson 0.02 sq mi
14 15075 Rural Ridge Allegheny 0.03 sq mi
15 16312 Chandlers Valley Warren 0.03 sq mi
16 17250 Rouzerville Franklin 0.03 sq mi
17 18239 Milnesville Luzerne 0.03 sq mi
18 15290 Pittsburgh Allegheny 0.04 sq mi
19 17077 Ono Lebanon 0.04 sq mi
20 17606 Lancaster Lancaster 0.04 sq mi
21 17880 Swengel Union 0.04 sq mi
22 18225 Harleigh Luzerne 0.04 sq mi
23 16684 Tipton Blair 0.04 sq mi
24 17311 Codorus York 0.05 sq mi
25 15353 Nineveh Greene 0.06 sq mi
26 15072 Pricedale Westmoreland 0.06 sq mi
27 17056 Mexico Juniata 0.06 sq mi
28 19369 Sadsburyville Chester 0.06 sq mi
29 17884 Washingtonville Montour 0.06 sq mi
30 16654 Huntingdon Huntingdon 0.06 sq mi
31 16699 Cresson Cambria 0.06 sq mi
32 16236 Mc Grann Armstrong 0.07 sq mi
33 17323 Franklintown York 0.07 sq mi
34 19442 Kimberton Chester 0.07 sq mi
35 15123 West Mifflin Allegheny 0.07 sq mi
36 19477 Spring House Montgomery 0.07 sq mi
37 15752 Kent Indiana 0.07 sq mi
38 17568 Refton Lancaster 0.07 sq mi
39 15378 Westland Washington 0.07 sq mi
40 16151 Sheakleyville Mercer 0.08 sq mi
41 16228 Ford Cliff Armstrong 0.08 sq mi
42 17974 Seltzer Schuylkill 0.08 sq mi
43 15925 Cassandra Cambria 0.08 sq mi
44 16682 Sproul Blair 0.08 sq mi
45 17506 Blue Ball Lancaster 0.08 sq mi
46 15350 Muse Washington 0.08 sq mi
47 15647 Larimer Westmoreland 0.08 sq mi
48 16172 New Wilmington Lawrence 0.08 sq mi
49 15691 Wendel Westmoreland 0.09 sq mi
50 15260 Pittsburgh Allegheny 0.09 sq mi

Showing the top 50 of 1,833 ZIP codes in Pennsylvania that have this figure and meet the threshold above. 19109 ranks 1st at 0.00 sq mi, against 0.09 sq mi in 50th place.

Other rankings for Pennsylvania

Cite this page

zipcodes.pro. “Smallest ZIP Codes in Pennsylvania by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/pa/smallest-area

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