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/TX/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Texas

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 77449 Katy Harris 63,010
2 78660 Pflugerville Travis 57,190
3 77494 Katy Fort Bend 56,440
4 77433 Cypress Harris 51,480
5 77084 Houston Harris 50,740
6 79936 El Paso El Paso 50,680
7 75052 Grand Prairie Dallas 47,050
8 78641 Leander Travis 46,990
9 78245 San Antonio Bexar 46,550
10 78130 New Braunfels Guadalupe 45,780
11 77573 League City Galveston 42,700
12 79938 El Paso El Paso 41,990
13 77429 Cypress Harris 41,780
14 77584 Pearland Brazoria 40,910
15 77479 Sugar Land Fort Bend 40,340
16 79928 El Paso El Paso 39,810
17 75126 Forney Kaufman 39,790
18 77459 Missouri City Fort Bend 39,600
19 78613 Cedar Park Williamson 39,600
20 75035 Frisco Collin 39,220
21 78521 Brownsville Cameron 38,820
22 77379 Spring Harris 38,490
23 76063 Mansfield Tarrant 37,990
24 78254 San Antonio Bexar 37,360
25 77407 Richmond Fort Bend 36,900
26 79912 El Paso El Paso 36,870
27 78253 San Antonio Bexar 36,550
28 78666 San Marcos Hays 36,290
29 78640 Kyle Hays 35,970
30 75056 The Colony Denton 35,840
31 76028 Burleson Johnson 35,800
32 77346 Humble Harris 35,440
33 76179 Fort Worth Tarrant 35,050
34 76244 Keller Tarrant 34,870
35 75217 Dallas Dallas 34,610
36 75071 Mckinney Collin 34,430
37 77083 Houston Harris 34,170
38 77493 Katy Harris 33,600
39 77373 Spring Harris 32,550
40 75002 Allen Collin 32,450
41 75068 Little Elm Denton 32,410
42 77095 Houston Harris 32,280
43 76227 Aubrey Denton 32,230
44 78572 Mission Hidalgo 32,080
45 77469 Richmond Fort Bend 31,820
46 75098 Wylie Collin 31,780
47 78577 Pharr Hidalgo 31,760
48 75067 Lewisville Denton 31,630
49 78046 Laredo Webb 31,530
50 78542 Edinburg Hidalgo 31,520

Showing the top 50 of 1,617 ZIP codes in Texas that have this figure . 77449 ranks 1st at 63,010, against 31,520 in 50th place.

Other rankings for Texas

Cite this page

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

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