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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 — ZIP/85621

85621

ZIP 85621 is in Nogales, Arizona, in Santa Cruz County; area code 520; Mountain Standard Time all year. Nogales has 3 ZIP codes; the others are 85628 and 85662.

Type
Standard
Time zone
America/Phoenix
County
Santa Cruz
Metro area
Nogales, AZ
Population
21,593
Coordinates
31.3880, -110.8997
☼ Live from 85621 — Nogales, AZ

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Local time: —

Where 85621 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 85621
  • 🔢 Type 85621 into a pocket calculator and turn it upside down: IZgSB — not quite a word, sorry.
  • ➕ 85621 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100111001110101
  • 🏠 Its numerical neighbours: 85620 (Naco, AZ, 56 mi away) and 85622 (Green Valley, AZ, 31 mi away).
  • 🔄 Backwards, 85621 becomes 12658, which is not a ZIP code at all.
  • 👥 54 other ZIP codes are made of exactly the same digits (12568, 12586, 12856, 12865, 15268, 15286, …). The farthest-flung twin is 12865 in Salem, NY, 2,197 miles away.
  • 🧭 Farther south than 90% of all ZIP codes, and farther west than 86%.
  • 🎯903 miles southwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 85621 and you would come out at 31.39°S, 69.10°E — 1,058 miles from Port Louis, Mauritius, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 12m of daylight. Shortest: 10h 06m.
  • 📏 At 284.9 square miles of land, 85621 is bigger than 94% of ZIP codes — room for about 216 Central Parks.
🌙 The sky over 85621 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population21,593This ZIP21,593
Households7,186This ZIP7,186
Housing units8,218This ZIP8,218
Median age36.6This ZIP36.6Arizona39.0US 38.9
Median household income$43,464This ZIP$43,464Arizona$79,964US $80,734
Median home value$193,200This ZIP$193,200Arizona$394,500US $332,700
Median gross rent$745This ZIP$745Arizona$1,543US $1,413
Bachelor's degree or higher17.6%This ZIP17.6%
Mean commute18.2 minThis ZIP18.2 min
Population density75.8 / sq miThis ZIP75.8 / sq mi

Business and tax activity

Business establishments655This ZIP655
Employees7,363This ZIP7,363
Annual payroll$336,209,000This ZIP$336,209,000
Tax returns filed10,110This ZIP10,110
Total adjusted gross income$465,587,000This ZIP$465,587,000

Land area

Land area284.93 sq miThis ZIP284.93 sq mi
Water area0.49 sq miThis ZIP0.49 sq mi

Other place names in 85621

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 85621

ZIPCityDistance
85648 Rio Rico, AZ 9.6 mi
85628 Nogales, AZ 10.0 mi
85662 Nogales, AZ 10.0 mi
85624 Patagonia, AZ 13.9 mi
85640 Tumacacori, AZ 15.1 mi
85646 Tubac, AZ 18.4 mi
85645 Amado, AZ 25.8 mi
85637 Sonoita, AZ 26.0 mi
85601 Arivaca, AZ 28.8 mi
85611 Elgin, AZ 28.9 mi

Find every ZIP code within 10 miles of 85621 →

Questions about this ZIP code

Where is ZIP code 85621?

85621 is in Nogales, Arizona, in Santa Cruz County, part of the Nogales, AZ micropolitan area. Its published point location is 31.3880, -110.8997.

What county is 85621 in?

85621 lies in Santa Cruz County.

What area code is 85621?

Nogales uses area code 520, from NANPA's telephone records.

What time zone is 85621 in?

85621 uses America/Phoenix.

How many people live in 85621?

About 21,593 people live in ZIP code 85621, in 7,186 households, at 75.8 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 85621?

$43,464 a year, against $79,964 across Arizona.

What ZIP codes are near 85621?

The closest are 85648 (9.6 mi), 85628 (10 mi), 85662 (10 mi), 85624 (13.9 mi) and 85640 (15.1 mi).

Is 85621 a PO Box ZIP code?

85621 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “85621 ZIP Code — Nogales, Arizona (Santa Cruz County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/85621

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