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/AZ/SMALLEST-AREA

Smallest ZIP Codes in Arizona by Land Area

What this measures. Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 85721 Tucson Pima 0.02 sq mi
2 85726 Tucson Pima 0.04 sq mi
3 85724 Tucson Pima 0.04 sq mi
4 85236 Higley Maricopa 0.04 sq mi
5 85654 Rillito Pima 0.08 sq mi
6 86011 Flagstaff Coconino 0.13 sq mi
7 85026 Phoenix Maricopa 0.16 sq mi
8 85723 Tucson Pima 0.22 sq mi
9 85532 Claypool Gila 0.22 sq mi
10 86313 Prescott Yavapai 0.24 sq mi
11 85329 Cashion Maricopa 0.32 sq mi
12 85709 Tucson Pima 0.39 sq mi
13 85191 Valley Farms Pinal 0.53 sq mi
14 85626 Pirtleville Cochise 0.98 sq mi
15 85734 Tucson Pima 1.14 sq mi
16 85620 Naco Cochise 1.15 sq mi
17 85135 Hayden Gila 1.45 sq mi
18 85701 Tucson Pima 1.48 sq mi
19 85363 Youngtown Maricopa 1.53 sq mi
20 85003 Phoenix Maricopa 1.86 sq mi
21 85608 Douglas Cochise 1.91 sq mi
22 85004 Phoenix Maricopa 2.05 sq mi
23 85012 Phoenix Maricopa 2.25 sq mi
24 85640 Tumacacori Santa Cruz 2.86 sq mi
25 85708 Tucson Pima 2.89 sq mi
26 85309 Luke Air Force Base Maricopa 3.57 sq mi
27 85378 Surprise Maricopa 3.60 sq mi
28 85013 Phoenix Maricopa 3.69 sq mi
29 85019 Phoenix Maricopa 3.73 sq mi
30 85535 Eden Graham 3.88 sq mi
31 85006 Phoenix Maricopa 3.97 sq mi
32 85045 Phoenix Maricopa 3.97 sq mi
33 85014 Phoenix Maricopa 4.04 sq mi
34 85031 Phoenix Maricopa 4.06 sq mi
35 85707 Tucson Pima 4.12 sq mi
36 85531 Central Graham 4.47 sq mi
37 85007 Phoenix Maricopa 4.60 sq mi
38 85015 Phoenix Maricopa 4.91 sq mi
39 85053 Phoenix Maricopa 5.17 sq mi
40 85017 Phoenix Maricopa 5.26 sq mi
41 85304 Glendale Maricopa 5.46 sq mi
42 85035 Phoenix Maricopa 5.60 sq mi
43 85714 Tucson Pima 5.64 sq mi
44 85306 Glendale Maricopa 5.86 sq mi
45 85942 Woodruff Navajo 5.93 sq mi
46 85302 Glendale Maricopa 6.01 sq mi
47 85033 Phoenix Maricopa 6.12 sq mi
48 85305 Glendale Maricopa 6.13 sq mi
49 85202 Mesa Maricopa 6.24 sq mi
50 85051 Phoenix Maricopa 6.36 sq mi

Showing the top 50 of 417 ZIP codes in Arizona that have this figure and meet the threshold above. 85721 ranks 1st at 0.02 sq mi, against 6.36 sq mi in 50th place.

Other rankings for Arizona

Cite this page

zipcodes.pro. “Smallest ZIP Codes in Arizona by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/az/smallest-area

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