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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/84120

84120

ZIP 84120 is in West Valley City, Utah, in Salt Lake County; area codes 801 and 385; Mountain time. West Valley City has 3 ZIP codes; the others are 84119 and 84128.

Type
Standard
Time zone
America/Denver
County
Salt Lake
Population
50,799
Coordinates
40.6969, -112.0017
☼ Live from 84120 — West Valley City, UT

Weather right now

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Local time: —

Where 84120 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 84120
  • 🔢 Type 84120 into a pocket calculator and turn it upside down: OZIhB — not quite a word, sorry.
  • ➕ As a number, 84,120 = 2 × 2 × 2 × 3 × 5 × 701. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100100010011000
  • 🏠 Its numerical neighbours: 84119 (West Valley City, UT, 3 mi away) and 84121 (Salt Lake City, UT, 17 mi away).
  • 🔄 Backwards, 84120 becomes 02148 — and that is a real ZIP code: Malden, MA, 2,099 miles away.
  • 👥 58 other ZIP codes are made of exactly the same digits (01824, 01842, 02148, 02184, 02481, 02814, …). The farthest-flung twin is 04281 in South Paris, ME, 2,107 miles away.
  • 🧭 Farther north than 63% of all ZIP codes, and farther west than 87%.
  • 🎯710 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 84120 and you would come out at 40.70°S, 68.00°E — 607 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 06m of daylight. Shortest: 9h 15m.
  • 📏 At 10.1 square miles of land, 84120 is bigger than 27% of ZIP codes — room for about 7.7 Central Parks.
🌙 The sky over 84120 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population50,799This ZIP50,799
Households13,847This ZIP13,847
Housing units14,316This ZIP14,316
Median age31.3This ZIP31.3Utah32.0US 38.9
Median household income$94,306This ZIP$94,306Utah$95,166US $80,734
Median home value$413,600This ZIP$413,600Utah$489,400US $332,700
Median gross rent$1,467This ZIP$1,467Utah$1,496US $1,413
Bachelor's degree or higher15.2%This ZIP15.2%
Mean commute21.6 minThis ZIP21.6 min
Population density5,030.6 / sq miThis ZIP5,030.6 / sq mi

Business and tax activity

Business establishments864This ZIP864
Employees29,348This ZIP29,348
Annual payroll$1,923,285,000This ZIP$1,923,285,000
Tax returns filed23,230This ZIP23,230
Total adjusted gross income$1,242,993,000This ZIP$1,242,993,000

Land area

Land area10.10 sq miThis ZIP10.10 sq mi
Water area0.00 sq mi

Other place names in 84120

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

ZIP codes near 84120

ZIPCityDistance
84128 West Valley City, UT 2.2 mi
84184 Salt Lake City, UT 2.7 mi
84119 West Valley City, UT 2.9 mi
84118 Salt Lake City, UT 3.4 mi
84129 Salt Lake City, UT 3.6 mi
84104 Salt Lake City, UT 3.8 mi
84199 Salt Lake City, UT 3.8 mi
84123 Salt Lake City, UT 5.0 mi
84090 Sandy, UT 5.3 mi
84091 Sandy, UT 5.3 mi

Find every ZIP code within 10 miles of 84120 →

Questions about this ZIP code

Where is ZIP code 84120?

84120 is in West Valley City, Utah, in Salt Lake County, part of the Salt Lake City-Murray, UT metropolitan area. Its published point location is 40.6969, -112.0017.

What county is 84120 in?

84120 lies in Salt Lake County.

What area code is 84120?

West Valley City uses area codes 801 and 385, from NANPA's telephone records.

What time zone is 84120 in?

84120 uses America/Denver.

How many people live in 84120?

About 50,799 people live in ZIP code 84120, in 13,847 households, at 5,030.6 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 84120?

$94,306 a year, against $95,166 across Utah.

What ZIP codes are near 84120?

The closest are 84128 (2.2 mi), 84184 (2.7 mi), 84119 (2.9 mi), 84118 (3.4 mi) and 84129 (3.6 mi).

Is 84120 a PO Box ZIP code?

84120 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “84120 ZIP Code — West Valley City, Utah (Salt Lake County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/84120

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