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/CA/LARGEST-AREA

Largest ZIP Codes in California by Land Area

What this measures. Land area of the Census tabulation area, in square miles. Water is excluded. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 92328 Death Valley Inyo 1,773.56 sq mi
2 92277 Twentynine Palms San Bernardino 1,599.10 sq mi
3 92266 Palo Verde Imperial 1,184.95 sq mi
4 93634 Lakeshore Fresno 1,162.28 sq mi
5 93514 Bishop Mono 1,007.10 sq mi
6 92332 Essex San Bernardino 941.00 sq mi
7 92004 Borrego Springs San Diego 914.88 sq mi
8 93210 Coalinga Fresno 775.38 sq mi
9 95043 Paicines San Benito 765.01 sq mi
10 93453 Santa Margarita San Luis Obispo 691.38 sq mi
11 96080 Red Bluff Tehama 647.55 sq mi
12 96101 Alturas Modoc 596.57 sq mi
13 92227 Brawley Imperial 593.67 sq mi
14 92225 Blythe Riverside 580.97 sq mi
15 95595 Zenia Trinity 552.76 sq mi
16 92364 Nipton San Bernardino 524.83 sq mi
17 96032 Fort Jones Siskiyou 519.65 sq mi
18 92239 Desert Center Riverside 517.02 sq mi
19 92036 Julian San Diego 504.31 sq mi
20 96130 Susanville Lassen 499.88 sq mi
21 93549 Olancha Inyo 494.49 sq mi
22 96064 Montague Siskiyou 487.01 sq mi
23 92365 Newberry Springs San Bernardino 483.32 sq mi
24 95363 Patterson Stanislaus 478.31 sq mi
25 93622 Firebaugh Fresno 455.35 sq mi
26 95321 Groveland Tuolumne 449.10 sq mi
27 93451 San Miguel Monterey 447.22 sq mi
28 93252 Maricopa Ventura 446.54 sq mi
29 95490 Willits Mendocino 430.12 sq mi
30 93446 Paso Robles San Luis Obispo 428.34 sq mi
31 95223 Arnold Alpine 426.79 sq mi
32 96091 Trinity Center Trinity 425.46 sq mi
33 92311 Barstow San Bernardino 424.42 sq mi
34 96027 Etna Siskiyou 419.19 sq mi
35 93454 Santa Maria Santa Barbara 418.29 sq mi
36 94558 Napa Napa 401.73 sq mi
37 93513 Big Pine Inyo 396.76 sq mi
38 95023 Hollister San Benito 394.83 sq mi
39 93545 Lone Pine Inyo 391.12 sq mi
40 93635 Los Banos Merced 390.74 sq mi
41 93265 Springville Tulare 389.68 sq mi
42 96010 Big Bar Trinity 383.85 sq mi
43 93257 Porterville Tulare 378.87 sq mi
44 93040 Piru Ventura 372.12 sq mi
45 92363 Needles San Bernardino 372.02 sq mi
46 92356 Lucerne Valley San Bernardino 365.58 sq mi
47 96058 Macdoel Siskiyou 364.69 sq mi
48 92309 Baker San Bernardino 358.49 sq mi
49 92250 Holtville Imperial 352.38 sq mi
50 93527 Inyokern Tulare 350.22 sq mi

Showing the top 50 of 1,802 ZIP codes in California that have this figure and meet the threshold above. 92328 ranks 1st at 1,773.56 sq mi, against 350.22 sq mi in 50th place.

Other rankings for California

Cite this page

zipcodes.pro. “Largest ZIP Codes in California by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/ca/largest-area

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