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/WA/LOWEST-AVERAGE-INCOME

ZIP Codes With the Lowest Average Income in Washington

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 98813 Bridgeport Douglas $33,438
2 98438 Mcchord Afb Pierce $35,600
3 99321 Beverly Grant $37,419
4 99348 Prescott Walla Walla $40,318
5 98832 Marlin Grant $41,043
6 98948 Toppenish Yakima $43,583
7 98932 Granger Yakima $43,883
8 99357 Royal City Grant $44,647
9 98951 Wapato Yakima $45,026
10 98439 Lakewood Pierce $46,373
11 99207 Spokane Spokane $47,129
12 99349 Mattawa Grant $47,651
13 98433 Tacoma Pierce $48,333
14 98933 Harrah Yakima $49,050
15 98944 Sunnyside Benton $49,138
16 98935 Mabton Yakima $49,303
17 98902 Yakima Yakima $50,554
18 99138 Inchelium Ferry $50,598
19 99040 Wellpinit Stevens $50,833
20 99011 Fairchild Air Force Base Spokane $51,073
21 98930 Grandview Yakima $51,389
22 99001 Airway Heights Spokane $51,470
23 98326 Clallam Bay Clallam $53,200
24 98849 Riverside Okanogan $53,464
25 99129 Fruitland Stevens $53,645
26 98841 Omak Okanogan $53,655
27 99173 Springdale Stevens $53,677
28 98647 Skamokawa Wahkiakum $53,876
29 98444 Tacoma Pierce $54,063
30 98952 White Swan Yakima $54,121
31 98593 Vader Lewis $54,139
32 98947 Tieton Yakima $54,308
33 98315 Silverdale Kitsap $54,366
34 98535 Copalis Beach Grays Harbor $55,167
35 98901 Yakima Yakima $55,684
36 99344 Othello Adams $55,935
37 99013 Ford Stevens $56,790
38 98409 Tacoma Pierce $56,904
39 99181 Valley Stevens $57,371
40 98938 Outlook Yakima $57,584
41 98855 Tonasket Okanogan $57,586
42 99033 Tekoa Whitman $57,603
43 98267 Marblemount Skagit $57,722
44 98572 Pe Ell Lewis $57,754
45 99330 Eltopia Franklin $58,206
46 98304 Ashford Pierce $58,369
47 98404 Tacoma Pierce $58,428
48 99343 Mesa Franklin $58,488
49 99205 Spokane Spokane $58,782
50 99157 Northport Stevens $58,970

Showing the top 50 of 468 ZIP codes in Washington that have this figure and meet the threshold above. 98813 ranks 1st at $33,438, against $58,970 in 50th place.

Other rankings for Washington

Cite this page

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

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