Zip Code 84121
Salt Lake City, Utah — Salt Lake County
📍 ZIP code 84121 is in Salt Lake City, Salt Lake County, Utah.
ZIP code 84121 is located in Salt Lake City, Salt Lake County, Utah. It is a zip code in the Mountain (MST/MDT) Time Zone with an estimated population of 39,204. The area code for ZIP code 84121 is 801.
Quick Answer
Zip code 84121 is in Salt Lake City, Utah (Salt Lake County). It has a population of 39,204, median household income of $114,912, and median home value of $614,500.
Population
39,204
Income
$114,912
Home Value
$614,500
Climate
73°F / 15°F
About Zip Code 84121
Zip code 84121 is located in Salt Lake City, Utah, within Salt Lake County. Home to approximately 39,204 residents, this area sits at an elevation of 8314 ft and falls within the Mountain (MST/MDT) timezone. The local area code is 801.
The median household income is $114,912 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $614,500, and the cost of living index is 172 (72% above the national average of 100).
Summers average a high of 73°F while winters drop to 15°F. The area receives about 47 in of rain and 458 in of snow annually. The zip code covers 64.4 square miles of land area and 0.2 square miles of water.
Key Statistics
39,204
$114,912
$614,500
Mountain (MST/MDT)
801
8314 ft
64.4 sq mi
40.1
16,669
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Compare With Nearby Zip Codes
| Metric | 84121 | 84092 | 84109 | 84093 | 84124 | 84004 |
|---|---|---|---|---|---|---|
| City | Salt Lake City, UT | Alta, UT | Salt Lake City, UT | Sandy, UT | Salt Lake City, UT | American Fork, UT |
| Population | 39,204 | 28,162 | 25,879 | 23,998 | 22,992 | 10,272 |
| Median Income | $114,912 | $153,333 | $136,823 | $132,453 | $117,500 | $156,786 |
| Home Value | $614,500 | $706,400 | $679,000 | $643,800 | $704,400 | $893,400 |
| Cost of Living | 172 | 215 | 204 | 197 | 198 | 250 |
| Median Age | 40.1 | 42.3 | 35.8 | 39.8 | 39.8 | 36.7 |
Cost of Living
100 = National Average. Salt Lake City's cost of living is 72% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
5.3x
Demographics
Zip code 84121 has a population of 39,204 people with a median age of 40.1. There are 16,669 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Salt Lake City (84121) population trend from 2010 to 2024
↓ -35.6%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
73°F
15°F
47 in
458 in
Salt Lake City experiences mild summers with average highs around 73°F. Winters are cold with lows averaging 15°F. With 458 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$614,500
Median Household Income
$114,912
With 16,669 housing units across 64.4 square miles, 84121 has a housing density of 259 units per square mile. The home price-to-income ratio is 5.3x.
Location & Geography
Latitude
40.6170°
Longitude
-111.6868°
Land Area
64.4 sq mi
Water Area
0.2 sq mi
Nearby Zip Codes
Zip codes closest to 84121 (Salt Lake City, UT) with distances:
All Zip Codes in Salt Lake City, UT
Other zip codes serving Salt Lake City:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 84121's $114,912. A way to compare Salt Lake City to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 84121 (Salt Lake City, UT). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Salt Lake City, Utah?
Salt Lake City, Utah uses zip code 84121 along with 12 other zip codes.
What county is zip code 84121 in?
Zip code 84121 is located in Salt Lake County, Utah.
What is the population of zip code 84121?
The population of zip code 84121 is 39,204 with a median age of 40.1.
Is 84121 in Salt Lake City, Utah?
Yes, zip code 84121 is in Salt Lake City, Salt Lake County, Utah. The area code is 801.
Frequently Asked Questions
What city is zip code 84121 in?
Zip code 84121 is in Salt Lake City, Utah. It is part of Salt Lake County and uses the Mountain (MST/MDT) timezone.
What is zip code 84121?
Zip code 84121 is a U.S. postal code in Salt Lake City, Utah (Salt Lake County). It has a population of 39,204 and covers 64.4 square miles.
What is the population of zip code 84121?
The population of zip code 84121 (Salt Lake City, UT) is 39,204 with a median age of 40.1. There are approximately 16,669 housing units in this area.
What is the median income in zip code 84121?
The median household income in zip code 84121 (Salt Lake City, UT) is $114,912 per year. The cost of living index is 172 (100 = national average).
What is the average home price in zip code 84121?
The median home value in zip code 84121 (Salt Lake City, UT) is $614,500. The cost of living index is 172 compared to the national average of 100.
What county is zip code 84121 in?
Zip code 84121 is located in Salt Lake County, Utah. The primary city is Salt Lake City.
What is the area code for zip code 84121?
Zip code 84121 in Salt Lake City, UT uses area code 801. It is located in the Mountain (MST/MDT) timezone.
Is zip code 84121 a good place to live?
Zip code 84121 (Salt Lake City, UT) has a cost of living index of 172 (100 = national average), a median household income of $114,912, and median home values of $614,500. The median age is 40.1. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 84121?
The cost of living index for zip code 84121 (Salt Lake City, UT) is 172, where 100 represents the national average. This area is above the national average. Median home value: $614,500.
What schools serve zip code 84121?
Zip code 84121 in Salt Lake City, Utah is served by the local school district of Salt Lake County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.