Residential delivery area · Utah
ZIP Code 84121: Salt Lake City, UT
ZIP code 84121 uses the postal name Salt Lake City, Utah and lies entirely in Salt Lake County (Census 2020 ZIP-county file). About 39,000 people live there (Census Bureau, ACS 2020-2024), the 2nd most populous of Salt Lake City's 24 residential ZIP codes. Median household income is $115,515 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Brighton (24%) and Cottonwood Heights (12%), and 7% in smaller places; 57% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Salt Lake City · 24 residential ZIPs
- County
- Salt Lake County
- Census places
- Brighton (24%); Cottonwood Heights (12%)
- Neighborhoods
- Biscayne Park, Brooktree Estates, Cotton Wood Cove, Country Garden Estates, Dawn Circle, Ellison Woods and 8 more GeoNames
- Metro area
- Salt Lake City-Murray, UT
- House district
- UT-3 119th Congress
- State
- Utah
- Time zone
- Mountain
- Land area
- 64.5 sq mi · 604 people per sq mi
- PO Box ZIPs
- 28 more ZIP codes use the name Salt Lake City for PO boxes or single organizations
Where is ZIP code 84121?
84121 centers on 40.617°, -111.687° and covers 64.5 square miles of land plus 0.2 of water. It borders 10 ZIP codes: 84092, 84109, 84124, 84093, 84117, 84060, 84003, 84047, 84107, 84049.
The map draws ZIP code areas only. For the streets inside 84121, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 84121 compare with the rest of Salt Lake City?
| Measure | 84121 | In Salt Lake City | In Salt Lake County | In UT |
|---|---|---|---|---|
| People (ACS 2020-2024) | 38,912 | 2nd of 24 | 10th of 42 | 27th of 298 |
| Median household income | $116k | 4th of 18 | 12th of 36 | 34th of 145 |
| Median home value | $660k | 6th of 18 | 10th of 36 | 21st of 153 |
Its median household income is higher than in 89% of U.S. residential ZIP codes, and it is denser than 74% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 84121?
The 2020 Census counted 41,628 people in 84121; the ACS, which samples households over 2020-2024, estimates 38,912. Between the 2010 and 2020 censuses its population fell 0.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 38,912
- 2020 Census count
- 41,628−0.2% since 2010 (41,702)
- Households
- 15,436
- Median age
- 41.1
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 84121?
Of the 38,912 people the ACS estimates in 84121, 20.6% are under 18 and 20.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.0%).
- Under 1820.6%
- 18 to 6458.9%
- 65 and older20.6%
- White, not Hispanic84.0%
- Hispanic or Latino6.7%
- Other or two or more4.8%
- Asian, not Hispanic3.8%
- Black, not Hispanic0.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 84121 earn?
Median household income is $115,515 (ACS 2020-2024), the 12th highest of the 36 ranked ZIP codes in Salt Lake County. It is not measurably different from 2015-2019 ($110,614 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $115,515
- Income per person
- $59,542
- Below the poverty line
- 7.2%
- Unemployed (of the labor force)
- 2.9%
- Adults 25+ with a bachelor's degree
- 53.2%
- Adjusted gross income per tax return, 2022
- $147,45320,080 returns; wages 53% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 84121?
FHFA's house price index for 84121, built from repeat sales and appraisals of the same homes, rose 127% from 2015 to 2025 and rose 57% from 2020 to 2025, and moved +2.6% in 2025.
- Median home value (owners' estimate)
- $659,900
- Median gross rent
- $1,774
- Homes owned by their occupants
- 74.9%
- Housing units
- 16,642
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 84121?
1,594 business establishments had a location in this ZIP code in 2023, 11 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services317
- Health care and social assistance201
- Finance and insurance194
- Real estate and rental and leasing162
- Construction129
- Accommodation and food services105
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 84121?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 84092 | Sandy | 27,651 | $152k | 4.7 mi |
| 84109 | Salt Lake City | 25,544 | $145k | 6.2 mi |
| 84124 | Salt Lake City | 22,609 | $120k | 7.2 mi |
| 84093 | Sandy | 23,871 | $139k | 7.6 mi |
| 84117 | Salt Lake City | 24,980 | $88k | 8.4 mi |
| 84060 | Park City | 8,619 | $128k | 9.6 mi |
| 84003 | American Fork | 57,430 | $120k | 10.0 mi |
| 84047 | Midvale | 37,411 | $76k | 10.8 mi |
| 84107 | Salt Lake City | 38,257 | $72k | 10.7 mi |
| 84049 | Midway | 6,833 | $151k | 12.0 mi |
| 84004 | Alpine | 10,427 | $171k | 9.1 mi (near) |
| 84094 | Sandy | 27,507 | $107k | 9.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.