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/DC/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in District of Columbia

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 20002 Washington District of Columbia 38,750
2 20011 Washington District of Columbia 36,260
3 20009 Washington District of Columbia 31,070
4 20019 Washington District of Columbia 27,250
5 20001 Washington District of Columbia 25,570
6 20020 Washington District of Columbia 22,760
7 20003 Washington District of Columbia 22,300
8 20010 Washington District of Columbia 17,620
9 20008 Washington District of Columbia 16,270
10 20032 Washington District of Columbia 15,520
11 20016 Washington District of Columbia 13,930
12 20007 Washington District of Columbia 11,760
13 20018 Washington District of Columbia 10,200
14 20017 Washington District of Columbia 9,980
15 20024 Washington District of Columbia 9,500
16 20012 Washington District of Columbia 8,310
17 20015 Washington District of Columbia 7,760
18 20005 Washington District of Columbia 7,360
19 20037 Washington District of Columbia 5,460
20 20036 Washington District of Columbia 3,580
21 20004 Washington District of Columbia 970
22 20006 Washington District of Columbia 430

Showing the top 22 of 22 ZIP codes in District of Columbia that have this figure . 20002 ranks 1st at 38,750, against 430 in 22nd place.

Other rankings for District of Columbia

Cite this page

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

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