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/PR/LARGEST-POPULATION

ZIP Codes With the Largest Population in Puerto Rico

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 00926 San Juan San Juan 92,284
2 00725 Caguas Caguas 73,462
3 00956 Bayamon Bayamón 66,734
4 00953 Toa Alta Toa Alta 66,156
5 00949 Toa Baja Toa Baja 65,867
6 00612 Arecibo Arecibo 62,908
7 00976 Trujillo Alto Trujillo Alto 60,620
8 00987 Carolina Carolina 55,747
9 00693 Vega Baja Vega Baja 55,387
10 00727 Caguas Caguas 55,191
11 00924 San Juan San Juan 49,922
12 00603 Aguadilla Aguadilla 48,448
13 00729 Canovanas Canóvanas 47,067
14 00745 Rio Grande Río Grande 46,739
15 00959 Bayamon Bayamón 46,260
16 00791 Humacao Humacao 45,455
17 00736 Cayey Cayey 45,306
18 00795 Juana Diaz Juana Díaz 43,367
19 00680 Mayaguez Mayagüez 42,689
20 00969 Guaynabo Guaynabo 42,231
21 00662 Isabela Isabela 41,090
22 00778 Gurabo Gurabo 40,203
23 00957 Bayamon Bayamón 40,194
24 00685 San Sebastian San Sebastián 39,988
25 00623 Cabo Rojo Cabo Rojo 39,212
26 00674 Manati Manatí 39,093
27 00777 Juncos Juncos 37,446
28 00659 Hatillo Hatillo 37,327
29 00602 Aguada Aguada 37,233
30 00676 Moca Moca 36,972
31 00754 San Lorenzo San Lorenzo 36,728
32 00728 Ponce Ponce 36,532
33 00646 Dorado Dorado 35,998
34 00771 Las Piedras Las Piedras 35,094
35 00784 Guayama Guayama 34,981
36 00739 Cidra Cidra 34,578
37 00783 Corozal Corozal 34,259
38 00769 Coamo Coamo 33,602
39 00921 San Juan San Juan 33,119
40 00692 Vega Alta Vega Alta 32,802
41 00627 Camuy Camuy 32,734
42 00698 Yauco Yauco 32,535
43 00983 Carolina Carolina 31,472
44 00730 Ponce Ponce 31,081
45 00985 Carolina Carolina 30,497
46 00738 Fajardo Fajardo 29,980
47 00767 Yabucoa Yabucoa 29,962
48 00719 Naranjito Naranjito 29,932
49 00683 San German San Germán 29,490
50 00682 Mayaguez Mayagüez 28,977

Showing the top 50 of 132 ZIP codes in Puerto Rico that have this figure . 00926 ranks 1st at 92,284, against 28,977 in 50th place.

Other rankings for Puerto Rico

Cite this page

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

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