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/LARGEST-POPULATION

ZIP Codes With the Largest Population in Louisiana

What this measures. Population of the Census tabulation area, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Population
1 70726 Denham Springs Livingston 63,575
2 70072 Marrero Jefferson 55,693
3 70301 Thibodaux Lafourche 50,095
4 70769 Prairieville Ascension 49,278
5 70737 Gonzales Ascension 49,084
6 70065 Kenner Jefferson 48,936
7 70816 Baton Rouge East Baton Rouge 45,718
8 71111 Bossier City Bossier 43,925
9 70810 Baton Rouge East Baton Rouge 42,659
10 70506 Lafayette Lafayette 42,318
11 70433 Covington St. Tammany 41,876
12 70508 Lafayette Lafayette 40,592
13 70605 Lake Charles Calcasieu 40,482
14 70056 Gretna Jefferson 40,348
15 70058 Harvey Jefferson 39,578
16 70003 Metairie Jefferson 39,344
17 70458 Slidell St. Tammany 39,034
18 70001 Metairie Jefferson 38,950
19 71203 Monroe Ouachita 38,354
20 70570 Opelousas St. Landry 37,565
21 70119 New Orleans Orleans 37,253
22 70560 New Iberia Iberia 36,996
23 70118 New Orleans Orleans 36,072
24 70808 Baton Rouge East Baton Rouge 35,843
25 71291 West Monroe Ouachita 35,269
26 70122 New Orleans Orleans 35,253
27 70461 Slidell St. Tammany 34,808
28 71360 Pineville Rapides 34,653
29 70454 Ponchatoula Tangipahoa 34,564
30 71106 Shreveport Caddo 34,117
31 71112 Bossier City Bossier 33,587
32 70817 Baton Rouge East Baton Rouge 33,482
33 71270 Ruston Lincoln 32,885
34 70068 La Place St. John the Baptist 32,720
35 70592 Youngsville Lafayette 32,167
36 70094 Westwego Jefferson 32,130
37 71107 Shreveport Caddo 31,734
38 70115 New Orleans Orleans 31,183
39 70815 Baton Rouge East Baton Rouge 31,024
40 70601 Lake Charles Calcasieu 30,872
41 70791 Zachary East Baton Rouge 30,385
42 70403 Hammond Tangipahoa 30,173
43 70364 Houma Terrebonne 28,716
44 70503 Lafayette Lafayette 28,643
45 70360 Houma Terrebonne 28,574
46 70806 Baton Rouge East Baton Rouge 28,302
47 70663 Sulphur Calcasieu 27,799
48 70123 New Orleans Jefferson 27,386
49 70607 Lake Charles Calcasieu 27,080
50 70126 New Orleans Orleans 27,047

Showing the top 50 of 539 ZIP codes in Louisiana that have this figure . 70726 ranks 1st at 63,575, against 27,047 in 50th place.

Other rankings for Louisiana

Cite this page

zipcodes.pro. “ZIP Codes With the Largest Population in Louisiana.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/la/largest-population

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