84121, UT Demographics

Population 38,881 · Census ACS 2020–24

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84121, UT map of median age by neighborhood
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Population and households in ZIP 84121

Household size in ZIP 84121

Household size, people per household
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–102.733.133.212.68
2010–142.743.173.282.73
2015–192.593.143.252.71
2020–242.532.953.112.65
Change−0.20−0.17−0.09−0.03
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Households in ZIP 84121 run a little small, averaging 2.53 people against 2.65 nationally, which usually means more singles and couples and fewer children. Household size has dropped from 2.73 in 2006–10, a much bigger shift than nationally. ZIP 84121 has smaller households than at least four in five Utah ZIP codes.

Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).

Median age in ZIP 84121

Median age, years
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–1039.130.929.937.7
2010–1440.532.130.838.6
2015–1942.733.332.039.6
2020–2442.634.833.140.1
Change+3.4+3.9+3.2+2.3
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ZIP 84121 skews a little older than the country: its median age is 42.6, against 40.1 nationally. The median age has climbed from 39.1 in 2006–10, in line with the national trend. Only six of the 106 Utah ZIP codes with 5,000+ people are older.

Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).

Single-parent households in ZIP 84121

Single-parent households, % of households
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–106.1%10.1%9.1%12.3%
2010–147.4%10.9%9.6%12.3%
2015–196.5%10.7%9.3%11.6%
2020–246.5%10.2%8.9%11.6%
Change+0.4 pts+0.1 pts−0.2 pts−0.6 pts
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Single-parent households are relatively rare in ZIP 84121: 6.5% of households, against 11.6% nationally. ZIP 84121 has a lower share of single-parent households than most Utah ZIP codes.

Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).

Housing in ZIP 84121

Renters in ZIP 84121

Renters, % of occupied homes
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–1023.4%31.1%28.8%33.3%
2010–1424.9%32.9%30.3%35.6%
2015–1923.2%32.2%29.8%36.0%
2020–2423.9%33.0%29.8%34.8%
Change+0.5 pts+1.9 pts+0.9 pts+1.5 pts
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ZIP 84121 is largely a place of homeowners: only 23.9% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. About four in ten owners (39.6%) have paid off their mortgages, about the same as nationally. The renter share is up 0.5 points from 2006–10, as it has nationally.

Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).

Vacant homes in ZIP 84121

Vacant homes, % of all homes
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–1010.6%7.0%8.7%11.4%
2010–148.9%6.7%8.3%11.4%
2015–199.3%6.0%8.0%11.1%
2020–247.4%6.1%7.3%9.6%
Change−3.2 pts−0.9 pts−1.4 pts−1.8 pts
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Vacancy is on the low side in ZIP 84121: 7.4% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. The picture is much the same across the Salt Lake City area. Since 2006–10, vacancy has fallen 3.2 points, as it has nationally.

Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).

Age of homes in ZIP 84121

Age of homes, median year built
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–101976198019841974
2010–141977198219851975
2015–191977198319871977
2020–241979198719911980
Change+3+7+8+6
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Homes in ZIP 84121 are about the same age as the nation's housing: the median home was built in 1979, versus 1980 nationally. Homes here are older than in the Salt Lake City area as a whole, where the median home dates to 1987. The newest homes are mostly in the center, the oldest in the west.

Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).

Rent in ZIP 84121

Rent, per month
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–10$1,077$1,067$971$965
2010–14$1,029$1,131$1,064$1,040
2015–19$1,441$1,296$1,222$1,213
2020–24$2,015$1,796$1,701$1,571
Change+$938+$729+$729+$606
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A typical rental in ZIP 84121 costs $2,015 a month with utilities, well above the national median of $1,571. Rents are up $938 a month from 2006–10, an 87% jump, faster than rents rose nationally. The typical renter here spends 28.3% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Rents run highest in the southeast and lowest in the center.

Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).

Education in ZIP 84121

Bachelor's degrees in ZIP 84121

Bachelor's degrees, % of adults 25+
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–1044.3%28.8%29.7%28.4%
2010–1444.4%30.3%31.2%29.6%
2015–1950.9%34.3%34.3%32.1%
2020–2453.4%37.9%38.3%35.6%
Change+9.1 pts+9.1 pts+8.6 pts+7.2 pts
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College graduates are unusually common in ZIP 84121: 53.4% of adults 25 and older have a bachelor's degree or higher, against 35.6% nationally. Education tends to track local incomes and the kinds of jobs nearby. Since 2006–10, the share with a degree has risen 9.1 points, in line with the national trend.

Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

High school graduates in ZIP 84121

High school graduates, % of adults 25+
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–1096.3%89.0%91.1%84.9%
2010–1496.3%89.5%91.5%86.1%
2015–1997.0%90.9%92.6%87.7%
2020–2497.0%91.7%93.5%89.3%
Change+0.7 pts+2.6 pts+2.4 pts+4.3 pts
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Finishing high school is nearly universal in ZIP 84121: 97.0% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Since 2006–10, the share with a diploma has edged up 0.7 points, a smaller shift than nationally.

High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

Jobs in ZIP 84121

Unemployment, % of the labor force
PeriodZIP 84121Salt Lake City areaUtahU.S.
2006–104.8%6.0%5.8%8.1%
2010–145.1%7.0%6.8%9.4%
2015–192.9%3.6%3.6%5.6%
2020–242.8%3.8%3.5%5.4%
Change−2.0 pts−2.2 pts−2.3 pts−2.7 pts
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The job market in ZIP 84121 has been strong: just 2.8% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment has fallen 2.0 points since 2006–10, mirroring the country. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current job market.

Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).

ZIP 84121 compared with nearby ZIP codes

ZIP codeHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
ZIP 841212.5342.66.5%23.9%7.4%1979$2,01553.4%97.0%2.8%
ZIP 840932.9740.85.7%10.8%4.8%1981$2,06253.3%97.5%3.7%
ZIP 841172.3743.87.1%33.6%6.9%1975$1,73354.4%97.2%4.0%
ZIP 840472.3734.612.2%55.5%9.2%1979$1,57936.2%91.3%2.9%
ZIP 841242.7338.96.4%22.4%7.3%1968$1,61459.7%98.2%2.6%
ZIP 841072.3035.410.6%54.7%7.9%1985$1,53438.7%92.0%4.6%
ZIP 840942.8636.79.3%24.9%3.3%1982$1,96439.4%94.8%2.7%
ZIP 840702.6633.212.5%43.3%7.1%1989$1,89234.9%94.4%3.1%
ZIP 840922.9543.66.8%9.5%5.4%1987$2,33254.3%98.1%2.7%
ZIP 841092.8736.95.1%20.1%9.9%1962$1,80768.1%98.8%2.8%
ZIP 841232.7236.89.6%37.8%7.1%1983$1,66427.8%89.8%5.7%

All figures 2020–24.

Zip codes with similar populations: 85226, AZ · 46514, IN · 47401, IN · 47905, IN · 48183, MI · 49442, MI · 49508, MI · 52402, IA · 60660, IL · 83704, ID

About these numbers

Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up ZIP 84121. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.

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