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/OH/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Ohio

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 43123 Grove City Franklin 35,070
2 43081 Westerville Franklin 34,550
3 44256 Medina Medina 33,960
4 45011 Hamilton Butler 33,460
5 44060 Mentor Lake 33,010
6 43026 Hilliard Franklin 32,320
7 44035 Elyria Lorain 31,050
8 44077 Painesville Lake 30,350
9 43230 Columbus Franklin 29,980
10 43015 Delaware Delaware 29,930
11 43055 Newark Licking 29,080
12 43130 Lancaster Fairfield 28,710
13 43068 Reynoldsburg Franklin 28,610
14 45040 Mason Warren 28,110
15 45140 Loveland Clermont 27,500
16 44130 Cleveland Cuyahoga 27,340
17 45840 Findlay Hancock 27,160
18 44107 Lakewood Cuyahoga 26,960
19 43228 Columbus Franklin 26,840
20 45069 West Chester Butler 26,820
21 45013 Hamilton Butler 26,230
22 43701 Zanesville Muskingum 25,650
23 45424 Dayton Montgomery 25,130
24 45044 Middletown Butler 25,110
25 43229 Columbus Franklin 24,870
26 45601 Chillicothe Ross 24,080
27 44212 Brunswick Medina 23,960
28 44646 Massillon Stark 23,820
29 43147 Pickerington Fairfield 23,260
30 43016 Dublin Franklin 23,240
31 45014 Fairfield Butler 23,160
32 43065 Powell Delaware 23,110
33 43235 Columbus Franklin 22,900
34 45238 Cincinnati Hamilton 22,880
35 43551 Perrysburg Wood 22,150
36 43302 Marion Marion 22,090
37 43207 Columbus Franklin 21,870
38 43232 Columbus Franklin 21,840
39 44124 Cleveland Cuyahoga 21,390
40 43110 Canal Winchester Fairfield 20,990
41 45231 Cincinnati Hamilton 20,840
42 44720 North Canton Stark 20,820
43 44691 Wooster Wayne 20,580
44 43017 Dublin Franklin 20,540
45 44224 Stow Summit 20,430
46 44094 Willoughby Lake 20,360
47 44134 Cleveland Cuyahoga 20,250
48 43204 Columbus Franklin 19,750
49 44870 Sandusky Erie 19,670
50 43224 Columbus Franklin 19,610

Showing the top 50 of 996 ZIP codes in Ohio that have this figure . 43123 ranks 1st at 35,070, against 19,610 in 50th place.

Other rankings for Ohio

Cite this page

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

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