Salt Lake County · Utah
ZIP code 84121
- Population
- 39,204
- Median income
- $114,912
- Median home
- $614,500
- Sales tax
- 4.85%
ZCTA residents
Household, past 12 months
Owner-occupied value
Utah state rate
Quick answer
ZIP 84121 sits in Salt Lake County, Utah and is home to 39,204 people. Median household income is $114,912, the median home is worth $614,500 and median gross rent is $1,732. 74.3% of households own their home, and purchases are taxed at 4.85% (Utah state rate).
- County
- Salt Lake County
- State
- Utah (UT)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 49035
299 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 84121
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 39,204ZIP 84121 residents
- Median household income
- $114,912Past 12 months, inflation adjusted
- Median home value
- $614,500Owner-occupied units
- Median gross rent
- $1,732Rent plus utilities, monthly
- Median age
- 40.1 yrsAll residents
- Homeownership rate
- 74.3%Owner-occupied households
Sales tax in 84121
What a purchase inside this ZIP costs at checkout.
Utah levies 4.85% statewide, and counties, cities and special districts inside this ZIP can add their own local rate on top. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 84121 compares
ZIP 84121 against the median ZIP in Salt Lake County and across Utah.
| Measure | ZIP 84121 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | $114,912 | $94,098 | $78,550 | +46% |
| Median home value | $614,500 | $480,900 | $363,100 | +69% |
| Median gross rent | $1,732 | $1,562 | $1,173 | +48% |
| Population | 39,204 | 28,950 | 1,463 | +2580% |
Medians are computed across the 42 ZIP areas in Salt Lake County and the 299 ZIP areas in Utah.
Statewide rank
Where this ZIP places among all 299 Utah ZIP areas.
- Income
- #37
- Home value
- #28
- Population
- #26
richer than 86% of 265 state ZIPs
above 90% of 274 state ZIPs
larger than 91% of 299 state ZIPs
Comparable ZIP codes
Utah ZIP areas with almost the same household income.
Nearby ZIP codes
Other ZIP codes filed under Salt Lake County.
ZIP 84121 questions
Common questions about this ZIP code.
- Where is ZIP code 84121?
- ZIP 84121 lies mostly in Salt Lake County, Utah. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 84121?
- Utah charges 4.85% statewide, plus any county, city or district rate that applies locally.
- Is 84121 expensive to live in?
- Median rent runs $1,732 a month, about 18% of median household income, and the median home is worth $614,500 — +69% against the typical Utah ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- Utah State Tax Commission — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.