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/IN/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Indiana

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 46307 Crown Point Lake 34,930
2 46143 Greenwood Johnson 30,520
3 46227 Indianapolis Marion 26,100
4 46032 Carmel Hamilton 25,420
5 47130 Jeffersonville Clark 24,620
6 46074 Westfield Hamilton 24,100
7 47150 New Albany Floyd 23,390
8 46037 Fishers Hamilton 22,770
9 47906 West Lafayette Tippecanoe 22,450
10 47201 Columbus Bartholomew 22,390
11 46060 Noblesville Hamilton 21,680
12 46237 Indianapolis Marion 21,660
13 46140 Greenfield Hancock 21,500
14 46038 Fishers Hamilton 21,280
15 46112 Brownsburg Hendricks 21,260
16 47909 Lafayette Tippecanoe 21,210
17 47905 Lafayette Tippecanoe 21,130
18 46123 Avon Hendricks 20,920
19 46350 La Porte LaPorte 20,900
20 46514 Elkhart Elkhart 20,890
21 46385 Valparaiso Porter 20,840
22 46226 Indianapolis Marion 20,050
23 46062 Noblesville Hamilton 19,840
24 47374 Richmond Wayne 19,700
25 46383 Valparaiso Porter 19,630
26 46360 Michigan City LaPorte 19,480
27 46220 Indianapolis Marion 19,470
28 46368 Portage Porter 19,430
29 46254 Indianapolis Marion 19,290
30 46168 Plainfield Hendricks 18,820
31 47630 Newburgh Warrick 18,790
32 46033 Carmel Hamilton 18,620
33 46835 Fort Wayne Allen 18,590
34 46410 Merrillville Lake 18,510
35 47401 Bloomington Monroe 18,300
36 46902 Kokomo Howard 18,180
37 46901 Kokomo Howard 17,770
38 46224 Indianapolis Marion 17,710
39 46203 Indianapolis Marion 17,570
40 46219 Indianapolis Marion 17,150
41 46217 Indianapolis Marion 16,890
42 46239 Indianapolis Marion 16,400
43 46077 Zionsville Boone 16,320
44 46260 Indianapolis Marion 16,130
45 46142 Greenwood Johnson 16,050
46 46544 Mishawaka St. Joseph 15,800
47 46131 Franklin Johnson 15,750
48 47403 Bloomington Monroe 15,740
49 46342 Hobart Lake 15,720
50 46526 Goshen Elkhart 15,510

Showing the top 50 of 673 ZIP codes in Indiana that have this figure . 46307 ranks 1st at 34,930, against 15,510 in 50th place.

Other rankings for Indiana

Cite this page

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

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