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/ID/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Idaho

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 83646 Meridian Ada 32,960
2 83642 Meridian Ada 29,500
3 83709 Boise Ada 28,790
4 83301 Twin Falls Twin Falls 27,070
5 83686 Nampa Canyon 25,960
6 83854 Post Falls Kootenai 24,400
7 83401 Idaho Falls Bonneville 20,180
8 83704 Boise Ada 19,950
9 83687 Nampa Canyon 19,140
10 83815 Coeur d'Alene Kootenai 18,110
11 83616 Eagle Ada 17,190
12 83605 Caldwell Canyon 17,070
13 83501 Lewiston Nez Perce 17,020
14 83201 Pocatello Bannock 16,740
15 83607 Caldwell Canyon 16,730
16 83651 Nampa Canyon 15,510
17 83706 Boise Ada 15,080
18 83440 Rexburg Madison 14,760
19 83634 Kuna Ada 14,550
20 83713 Boise Ada 14,420
21 83705 Boise Ada 14,040
22 83714 Garden City Ada 13,820
23 83402 Idaho Falls Bonneville 12,900
24 83814 Coeur d'Alene Kootenai 12,370
25 83835 Hayden Kootenai 12,240
26 83702 Boise Ada 12,200
27 83843 Moscow Latah 11,740
28 83404 Idaho Falls Bonneville 11,710
29 83221 Blackfoot Bingham 11,560
30 83716 Boise Elmore 10,520
31 83647 Mountain Home Elmore 10,190
32 83202 Pocatello Bannock 10,040
33 83442 Rigby Jefferson 10,010
34 83864 Sandpoint Bonner 9,530
35 83338 Jerome Jerome 9,120
36 83858 Rathdrum Kootenai 8,990
37 83703 Boise Ada 8,800
38 83617 Emmett Gem 8,140
39 83406 Idaho Falls Bonneville 8,030
40 83669 Star Ada 7,840
41 83318 Burley Cassia 7,820
42 83204 Pocatello Power 7,750
43 83644 Middleton Canyon 6,970
44 83350 Rupert Minidoka 5,760
45 83333 Hailey Blaine 5,580
46 83661 Payette Payette 4,700
47 83712 Boise Ada 4,630
48 83316 Buhl Twin Falls 4,620
49 83274 Shelley Bingham 4,610
50 83263 Preston Franklin 4,330

Showing the top 50 of 215 ZIP codes in Idaho that have this figure . 83646 ranks 1st at 32,960, against 4,330 in 50th place.

Other rankings for Idaho

Cite this page

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

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