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/LA/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Louisiana

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 70726 Denham Springs Livingston 25,990
2 70072 Marrero Jefferson 25,230
3 70065 Kenner Jefferson 22,340
4 70737 Gonzales Ascension 21,380
5 70769 Prairieville Ascension 20,990
6 70810 Baton Rouge East Baton Rouge 19,690
7 70301 Thibodaux Lafourche 19,330
8 70433 Covington St. Tammany 19,110
9 70508 Lafayette Lafayette 19,070
10 70816 Baton Rouge East Baton Rouge 18,920
11 71111 Bossier City Bossier 18,460
12 70506 Lafayette Lafayette 18,420
13 70003 Metairie Jefferson 18,270
14 70058 Harvey Jefferson 17,450
15 70817 Baton Rouge East Baton Rouge 17,370
16 70001 Metairie Jefferson 17,210
17 70458 Slidell St. Tammany 16,960
18 70056 Gretna Jefferson 16,800
19 70605 Lake Charles Calcasieu 15,720
20 71203 Monroe Ouachita 15,380
21 70570 Opelousas St. Landry 15,320
22 70119 New Orleans Orleans 15,270
23 70454 Ponchatoula Tangipahoa 15,170
24 70560 New Iberia Iberia 14,750
25 70122 New Orleans Orleans 14,690
26 70461 Slidell St. Tammany 14,580
27 71291 West Monroe Ouachita 14,380
28 71360 Pineville Rapides 14,310
29 71106 Shreveport Caddo 14,270
30 71112 Bossier City Bossier 14,180
31 70592 Youngsville Lafayette 13,840
32 70068 La Place St. John the Baptist 13,770
33 70808 Baton Rouge East Baton Rouge 13,520
34 70115 New Orleans Orleans 13,310
35 70094 Westwego Jefferson 13,250
36 70791 Zachary East Baton Rouge 13,170
37 70123 New Orleans Jefferson 13,060
38 70503 Lafayette Lafayette 12,610
39 70815 Baton Rouge East Baton Rouge 12,360
40 71107 Shreveport Caddo 12,260
41 70403 Hammond Tangipahoa 12,200
42 70364 Houma Terrebonne 12,010
43 70448 Mandeville St. Tammany 11,720
44 71270 Ruston Lincoln 11,670
45 70117 New Orleans Orleans 11,650
46 70809 Baton Rouge East Baton Rouge 11,600
47 70005 Metairie Jefferson 11,590
48 70360 Houma Terrebonne 11,530
49 70517 Breaux Bridge St. Martin 11,430
50 70118 New Orleans Orleans 11,420

Showing the top 50 of 443 ZIP codes in Louisiana that have this figure . 70726 ranks 1st at 25,990, against 11,420 in 50th place.

Other rankings for Louisiana

Cite this page

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

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