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zipcodes.pro — ZIP/84121

84121

ZIP 84121 is in Salt Lake City, Utah, in Salt Lake County; area codes 801 and 385; Mountain time. Salt Lake City has 52 ZIP codes in all.

Type
Standard
Time zone
America/Denver
County
Salt Lake
Population
38,912
Coordinates
40.6170, -111.6868
☼ Live from 84121 — Salt Lake City, UT

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Where 84121 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 84121
  • 🔢 Type 84121 into a pocket calculator and turn it upside down: IZIhB — not quite a word, sorry.
  • ➕ 84121 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100100010011001
  • 🏠 Its numerical neighbours: 84120 (West Valley City, UT, 17 mi away) and 84122 (Salt Lake City, UT, 12 mi away).
  • 🔄 Backwards, 84121 becomes 12148 — and that is a real ZIP code: Rexford, NY, 1,941 miles away.
  • 👥 28 other ZIP codes are made of exactly the same digits (11428, 12148, 12184, 12418, 12481, 12814, …). The farthest-flung twin is 11428 in Queens Village, NY, 1,973 miles away.
  • 🧭 Farther north than 62% of all ZIP codes, and farther west than 86%.
  • 🎯693 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 84121 and you would come out at 40.62°S, 68.31°E — 610 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 05m of daylight. Shortest: 9h 16m.
  • 📏 At 64.5 square miles of land, 84121 is bigger than 66% of ZIP codes — room for about 49 Central Parks.
🌙 The sky over 84121 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population38,912This ZIP38,912
Households15,436This ZIP15,436
Housing units16,642This ZIP16,642
Median age41.1This ZIP41.1Utah32.0US 38.9
Median household income$115,515This ZIP$115,515Utah$95,166US $80,734
Median home value$659,900This ZIP$659,900Utah$489,400US $332,700
Median gross rent$1,774This ZIP$1,774Utah$1,496US $1,413
Bachelor's degree or higher53.2%This ZIP53.2%
Mean commute21.9 minThis ZIP21.9 min
Population density603.7 / sq miThis ZIP603.7 / sq mi

Business and tax activity

Business establishments1,594This ZIP1,594
Employees22,785This ZIP22,785
Annual payroll$1,938,072,000This ZIP$1,938,072,000
Tax returns filed20,080This ZIP20,080
Total adjusted gross income$2,960,862,000This ZIP$2,960,862,000

Land area

Land area64.45 sq miThis ZIP64.45 sq mi
Water area0.16 sq miThis ZIP0.16 sq mi

Other place names in 84121

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

ZIP codes near 84121

ZIPCityDistance
84092 Sandy, UT 4.7 mi
84109 Salt Lake City, UT 6.2 mi
84124 Salt Lake City, UT 7.2 mi
84093 Sandy, UT 7.6 mi
84117 Salt Lake City, UT 8.4 mi
84004 Alpine, UT 9.1 mi
84060 Park City, UT 9.6 mi
84094 Sandy, UT 9.7 mi
84003 American Fork, UT 10.0 mi
84068 Park City, UT 10.1 mi

Find every ZIP code within 10 miles of 84121 →

Questions about this ZIP code

Where is ZIP code 84121?

84121 is in Salt Lake City, Utah, in Salt Lake County, part of the Salt Lake City-Murray, UT metropolitan area. Its published point location is 40.6170, -111.6868.

What county is 84121 in?

84121 lies in Salt Lake County.

What area code is 84121?

Salt Lake City uses area codes 801 and 385, from NANPA's telephone records.

What time zone is 84121 in?

84121 uses America/Denver.

How many people live in 84121?

About 38,912 people live in ZIP code 84121, in 15,436 households, at 603.7 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 84121?

$115,515 a year, against $95,166 across Utah.

What ZIP codes are near 84121?

The closest are 84092 (4.7 mi), 84109 (6.2 mi), 84124 (7.2 mi), 84093 (7.6 mi) and 84117 (8.4 mi).

Is 84121 a PO Box ZIP code?

84121 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “84121 ZIP Code — Salt Lake City, Utah (Salt Lake County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/84121

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