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/LOWEST-AVERAGE-INCOME

ZIP Codes With the Lowest Average Income in Idaho

What this measures. Total adjusted gross income divided by tax returns filed, lowest first. ZIP codes with fewer than 200 returns are excluded: the IRS suppresses small cells and the remainder swing too wildly to rank. Source: IRS Statistics of Income, ZIP code data, data release 2026-10-12.

# ZIP City County Average AGI per return
1 83868 Smelterville Shoshone $39,090
2 83648 Mountain Home Afb Elmore $43,753
3 83540 Lapwai Nez Perce $49,116
4 83321 Castleford Twin Falls $49,700
5 83546 Pierce Clearwater $50,387
6 83423 Dubois Clark $50,667
7 83830 Fernwood Benewah $52,467
8 83553 Weippe Clearwater $52,536
9 83346 Oakley Cassia $52,807
10 83604 Bruneau Owyhee $52,841
11 83623 Glenns Ferry Elmore $53,000
12 83837 Kellogg Shoshone $53,692
13 83873 Wallace Shoshone $54,226
14 83555 Winchester Nez Perce $54,779
15 83539 Kooskia Idaho $55,019
16 83605 Caldwell Canyon $55,294
17 83846 Mullan Shoshone $55,309
18 83651 Nampa Canyon $55,828
19 83523 Craigmont Lewis $56,194
20 83552 Stites Idaho $56,280
21 83352 Shoshone Lincoln $56,328
22 83355 Wendell Gooding $56,495
23 83232 Dayton Franklin $56,919
24 83234 Downey Bannock $57,046
25 83213 Arco Butte $57,267
26 83226 Challis Custer $57,501
27 83851 Plummer Benewah $57,518
28 83661 Payette Payette $57,642
29 83314 Bliss Gooding $57,868
30 83549 Riggins Idaho $57,970
31 83627 Hammett Owyhee $58,050
32 83342 Malta Cassia $58,328
33 83545 Peck Nez Perce $58,827
34 83440 Rexburg Madison $58,888
35 83445 Saint Anthony Fremont $59,081
36 83325 Eden Jerome $59,250
37 83628 Homedale Owyhee $59,547
38 83214 Arimo Bannock $59,617
39 83330 Gooding Gooding $59,625
40 83324 Dietrich Lincoln $59,719
41 83450 Terreton Jefferson $59,816
42 83436 Newdale Madison $60,042
43 83536 Kamiah Idaho $60,157
44 83443 Ririe Bonneville $60,572
45 83254 Montpelier Bear Lake $60,768
46 83271 Rockland Power $61,270
47 83672 Weiser Washington $61,399
48 83647 Mountain Home Elmore $61,601
49 83610 Cambridge Washington $61,686
50 83850 Pinehurst Shoshone $61,879

Showing the top 50 of 197 ZIP codes in Idaho that have this figure and meet the threshold above. 83868 ranks 1st at $39,090, against $61,879 in 50th place.

Other rankings for Idaho

Cite this page

zipcodes.pro. “ZIP Codes With the Lowest Average Income in Idaho.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/id/lowest-average-income

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