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/LARGEST-AREA

Largest ZIP Codes in Pennsylvania by Land Area

What this measures. Land area of the Census tabulation area, in square miles. Water is excluded. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 16720 Austin Potter 269.27 sq mi
2 16735 Kane McKean 263.16 sq mi
3 16915 Coudersport Potter 244.33 sq mi
4 16901 Wellsboro Tioga 230.44 sq mi
5 17745 Lock Haven Clinton 229.20 sq mi
6 16701 Bradford McKean 219.99 sq mi
7 17771 Trout Run Lycoming 219.52 sq mi
8 15834 Emporium Cameron 203.99 sq mi
9 16239 Marienville Forest 189.51 sq mi
10 15522 Bedford Bedford 187.66 sq mi
11 16749 Smethport McKean 185.65 sq mi
12 18801 Montrose Susquehanna 179.67 sq mi
13 16652 Huntingdon Huntingdon 173.69 sq mi
14 17764 Renovo Clinton 162.85 sq mi
15 15767 Punxsutawney Jefferson 159.97 sq mi
16 16866 Philipsburg Centre 157.11 sq mi
17 15825 Brookville Jefferson 154.89 sq mi
18 15535 Clearville Bedford 154.38 sq mi
19 18614 Dushore Sullivan 153.37 sq mi
20 18428 Hawley Pike 151.07 sq mi
21 15853 Ridgway Elk 150.41 sq mi
22 16353 Tionesta Forest 149.14 sq mi
23 16922 Galeton Potter 148.95 sq mi
24 15370 Waynesburg Greene 148.18 sq mi
25 16686 Tyrone Blair 146.93 sq mi
26 17751 Mill Hall Clinton 140.28 sq mi
27 16365 Warren Warren 139.28 sq mi
28 15868 Weedville Elk 137.96 sq mi
29 17740 Jersey Shore Lycoming 136.07 sq mi
30 18431 Honesdale Wayne 134.75 sq mi
31 17821 Danville Montour 134.50 sq mi
32 15860 Sigel Jefferson 134.32 sq mi
33 16830 Clearfield Clearfield 132.00 sq mi
34 15501 Somerset Somerset 132.00 sq mi
35 18847 Susquehanna Susquehanna 129.65 sq mi
36 17814 Benton Columbia 127.85 sq mi
37 17325 Gettysburg Adams 125.98 sq mi
38 17815 Bloomsburg Columbia 125.71 sq mi
39 17236 Mercersburg Franklin 125.66 sq mi
40 16823 Bellefonte Centre 124.47 sq mi
41 16354 Titusville Venango 124.03 sq mi
42 16836 Frenchville Clearfield 123.64 sq mi
43 15301 Washington Washington 121.96 sq mi
44 16841 Howard Centre 121.29 sq mi
45 18661 White Haven Luzerne 121.20 sq mi
46 18657 Tunkhannock Wyoming 118.17 sq mi
47 17202 Chambersburg Franklin 118.13 sq mi
48 16950 Westfield Tioga 116.12 sq mi
49 17257 Shippensburg Cumberland 115.17 sq mi
50 15870 Wilcox Elk 114.78 sq mi

Showing the top 50 of 1,833 ZIP codes in Pennsylvania that have this figure and meet the threshold above. 16720 ranks 1st at 269.27 sq mi, against 114.78 sq mi in 50th place.

Other rankings for Pennsylvania

Cite this page

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

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