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/SMALLEST-AREA

Smallest ZIP Codes in Missouri 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 63850 Grayridge Stoddard 0.01 sq mi
2 63962 Rombauer Butler 0.02 sq mi
3 65623 Butterfield Barry 0.02 sq mi
4 65801 Springfield Greene 0.02 sq mi
5 63155 Saint Louis St. Louis city 0.02 sq mi
6 63053 Kimmswick Jefferson 0.03 sq mi
7 65215 Columbia Boone 0.04 sq mi
8 65216 Columbia Boone 0.04 sq mi
9 63880 Whiteoak Dunklin 0.07 sq mi
10 63387 Whiteside Lincoln 0.09 sq mi
11 64654 Lock Springs Daviess 0.10 sq mi
12 65278 Renick Randolph 0.12 sq mi
13 63824 Blodgett Scott 0.12 sq mi
14 64765 Metz Vernon 0.13 sq mi
15 65675 Hurley Stone 0.13 sq mi
16 64090 Strasburg Cass 0.15 sq mi
17 63774 Perkins Scott 0.17 sq mi
18 63758 Kelso Scott 0.18 sq mi
19 64833 Avilla Jasper 0.20 sq mi
20 65654 Freistatt Lawrence 0.21 sq mi
21 63047 Hematite Jefferson 0.22 sq mi
22 65688 Brandsville Howell 0.26 sq mi
23 65897 Springfield Greene 0.26 sq mi
24 65409 Rolla Phelps 0.27 sq mi
25 63738 Brownwood Stoddard 0.28 sq mi
26 63840 Deering Pemiscot 0.30 sq mi
27 63853 Holland Pemiscot 0.30 sq mi
28 63467 Saverton Ralls 0.31 sq mi
29 63745 Dutchtown Cape Girardeau 0.33 sq mi
30 63365 New Melle St. Charles 0.33 sq mi
31 64102 Kansas City Jackson 0.34 sq mi
32 64858 Racine Newton 0.34 sq mi
33 63742 Commerce Scott 0.35 sq mi
34 64849 Neck City Jasper 0.35 sq mi
35 65726 Point Lookout Taney 0.35 sq mi
36 63101 Saint Louis St. Louis city 0.36 sq mi
37 64101 Kansas City Jackson 0.41 sq mi
38 64841 Duenweg Jasper 0.42 sq mi
39 64420 Allendale Worth 0.44 sq mi
40 64065 Lees Summit Jackson 0.48 sq mi
41 63820 Anniston Mississippi 0.49 sq mi
42 63140 Saint Louis St. Louis 0.53 sq mi
43 65320 Arrow Rock Saline 0.53 sq mi
44 63878 Tallapoosa New Madrid 0.54 sq mi
45 64857 Purcell Jasper 0.60 sq mi
46 63882 Wyatt Mississippi 0.68 sq mi
47 64433 Conception Nodaway 0.75 sq mi
48 65664 Halltown Lawrence 0.78 sq mi
49 63663 Pilot Knob Iron 0.79 sq mi
50 64105 Kansas City Jackson 0.80 sq mi

Showing the top 50 of 1,035 ZIP codes in Missouri that have this figure and meet the threshold above. 63850 ranks 1st at 0.01 sq mi, against 0.80 sq mi in 50th place.

Other rankings for Missouri

Cite this page

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

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