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/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Missouri

What this measures. Number of individual income tax returns filed. A rough proxy for how many households a ZIP code contains, available where census figures are not. Source: IRS Statistics of Income, ZIP code data, data release 2026-10-12.

# ZIP City County Returns filed
1 63376 Saint Peters St. Charles 38,520
2 65203 Columbia Boone 28,860
3 63021 Ballwin St. Louis 28,140
4 63129 Saint Louis St. Louis 27,260
5 63123 Saint Louis St. Louis 26,750
6 65807 Springfield Greene 26,740
7 63366 O Fallon St. Charles 26,120
8 63301 Saint Charles St. Charles 25,710
9 63385 Wentzville St. Charles 25,620
10 63303 Saint Charles St. Charles 23,940
11 65202 Columbia Boone 23,200
12 63031 Florissant St. Louis 22,630
13 63026 Fenton Jefferson 22,470
14 63368 O Fallon St. Charles 22,360
15 63304 Saint Charles St. Charles 21,490
16 63017 Chesterfield St. Louis 21,160
17 64118 Kansas City Clay 20,900
18 65802 Springfield Greene 20,550
19 63033 Florissant St. Louis 20,530
20 63122 Saint Louis St. Louis 20,040
21 63116 Saint Louis St. Louis city 19,950
22 65109 Jefferson City Cole 19,770
23 65804 Springfield Greene 19,610
24 65803 Springfield Greene 19,300
25 63136 Saint Louis St. Louis 18,460
26 63011 Ballwin St. Louis 18,350
27 63010 Arnold Jefferson 17,820
28 64055 Independence Jackson 17,630
29 64068 Liberty Clay 17,390
30 64804 Joplin Newton 17,040
31 63119 Saint Louis St. Louis 16,920
32 65714 Nixa Christian 16,680
33 63114 Saint Louis St. Louis 16,550
34 65201 Columbia Boone 16,470
35 63125 Saint Louis St. Louis 16,460
36 63701 Cape Girardeau Cape Girardeau 16,370
37 64133 Kansas City Jackson 16,370
38 63146 Saint Louis St. Louis 16,000
39 64119 Kansas City Clay 15,650
40 63128 Saint Louis St. Louis 15,530
41 64015 Blue Springs Jackson 15,530
42 65721 Ozark Christian 15,280
43 65301 Sedalia Pettis 15,180
44 64801 Joplin Jasper 15,110
45 64152 Kansas City Platte 14,850
46 63109 Saint Louis St. Louis city 14,460
47 63367 Lake Saint Louis St. Charles 14,240
48 63052 Imperial Jefferson 14,220
49 63901 Poplar Bluff Butler 14,220
50 64151 Kansas City Platte 14,130

Showing the top 50 of 888 ZIP codes in Missouri that have this figure . 63376 ranks 1st at 38,520, against 14,130 in 50th place.

Other rankings for Missouri

Cite this page

zipcodes.pro. “ZIP Codes With the Most Tax Returns Filed in Missouri.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/mo/most-tax-returns

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