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/MO/LARGEST-AREA

Largest ZIP Codes in Missouri 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 65560 Salem Dent 664.18 sq mi
2 63935 Doniphan Ripley 457.30 sq mi
3 65775 West Plains Howell 442.21 sq mi
4 65608 Ava Douglas 404.90 sq mi
5 65536 Lebanon Laclede 402.20 sq mi
6 63645 Fredericktown Madison 359.29 sq mi
7 63775 Perryville Perry 343.42 sq mi
8 65438 Birch Tree Shannon 295.42 sq mi
9 63638 Ellington Reynolds 295.32 sq mi
10 65711 Mountain Grove Wright 293.44 sq mi
11 63629 Bunker Shannon 289.32 sq mi
12 63664 Potosi Washington 287.67 sq mi
13 63901 Poplar Bluff Butler 285.01 sq mi
14 64730 Butler Bates 282.30 sq mi
15 65565 Steelville Crawford 275.94 sq mi
16 63565 Unionville Putnam 272.14 sq mi
17 64759 Lamar Barton 265.57 sq mi
18 64735 Clinton Henry 262.82 sq mi
19 65793 Willow Springs Howell 259.79 sq mi
20 65401 Rolla Phelps 258.58 sq mi
21 65340 Marshall Saline 254.04 sq mi
22 63670 Sainte Genevieve Ste. Genevieve 251.07 sq mi
23 64744 El Dorado Springs Cedar 250.10 sq mi
24 63834 Charleston Mississippi 249.55 sq mi
25 63080 Sullivan Franklin 248.80 sq mi
26 63556 Milan Sullivan 241.59 sq mi
27 65041 Hermann Gasconade 238.90 sq mi
28 64633 Carrollton Carroll 238.68 sq mi
29 64601 Chillicothe Livingston 238.58 sq mi
30 64776 Osceola St. Clair 237.33 sq mi
31 64673 Princeton Mercer 236.81 sq mi
32 65459 Dixon Maries 231.41 sq mi
33 65588 Winona Shannon 230.37 sq mi
34 64683 Trenton Grundy 228.96 sq mi
35 63965 Van Buren Carter 225.16 sq mi
36 65265 Mexico Audrain 223.56 sq mi
37 65301 Sedalia Pettis 223.41 sq mi
38 65556 Richland Pulaski 222.98 sq mi
39 65785 Stockton Cedar 219.07 sq mi
40 65542 Licking Texas 216.64 sq mi
41 65355 Warsaw Benton 216.10 sq mi
42 65251 Fulton Callaway 213.02 sq mi
43 63801 Sikeston Scott 212.73 sq mi
44 65606 Alton Oregon 212.50 sq mi
45 63640 Farmington St. Francois 209.26 sq mi
46 63501 Kirksville Adair 206.29 sq mi
47 63957 Piedmont Wayne 203.40 sq mi
48 64850 Neosho Newton 203.26 sq mi
49 65655 Gainesville Ozark 203.16 sq mi
50 64779 Rich Hill Bates 197.77 sq mi

Showing the top 50 of 1,035 ZIP codes in Missouri that have this figure and meet the threshold above. 65560 ranks 1st at 664.18 sq mi, against 197.77 sq mi in 50th place.

Other rankings for Missouri

Cite this page

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

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