Population 32,474 · Census ACS 2020–24
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Population and households in ZIP 78621
Household size in ZIP 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.91 | 2.69 | 2.87 | 2.68 |
| 2010–14 | 2.94 | 2.79 | 2.93 | 2.73 |
| 2015–19 | 3.39 | 2.83 | 2.95 | 2.71 |
| 2020–24 | 3.00 | 2.55 | 2.83 | 2.65 |
| Change | +0.10 | −0.14 | −0.05 | −0.03 |
ZIP 78621 is a place of big households: 3.00 people per home on average, compared with 2.65 nationally. Numbers like that usually point to plenty of families with kids. Since 2006–10, household size has climbed from 2.91, even as the national average fell.
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 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 35.8 | 34.0 | 34.7 | 37.7 |
| 2010–14 | 37.9 | 35.2 | 35.4 | 38.6 |
| 2015–19 | 40.1 | 36.3 | 36.1 | 39.6 |
| 2020–24 | 35.9 | 37.2 | 36.7 | 40.1 |
| Change | +0.1 | +3.3 | +2.0 | +2.3 |
ZIP 78621 is young: half of its residents are under 35.9, compared with a national median of 40.1. The population tilts toward young families with children. The youngest areas are in the northwest, the oldest in the center.
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 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 12.2% | 11.8% | 13.7% | 12.3% |
| 2010–14 | 12.6% | 11.2% | 13.7% | 12.3% |
| 2015–19 | 12.1% | 9.8% | 13.1% | 11.6% |
| 2020–24 | 15.1% | 9.7% | 12.9% | 11.6% |
| Change | +2.9 pts | −2.2 pts | −0.8 pts | −0.6 pts |
Single parents head just over one in seven households in ZIP 78621 (15.1%), well above the national share of 11.6%. The single-parent share is up 2.9 points from 2006–10, even as the national share fell.
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 78621
Renters in ZIP 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 22.6% | 40.7% | 35.2% | 33.3% |
| 2010–14 | 20.3% | 42.1% | 37.3% | 35.6% |
| 2015–19 | 24.4% | 41.8% | 38.0% | 36.0% |
| 2020–24 | 21.3% | 41.7% | 37.4% | 34.8% |
| Change | −1.3 pts | +1.0 pts | +2.3 pts | +1.5 pts |
ZIP 78621 is largely a place of homeowners: only 21.3% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 40.5% have no mortgage at all, about the same as nationally. The renter share has edged down 1.3 points since 2006–10, even as the national share rose.
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 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.3% | 8.8% | 11.8% | 11.4% |
| 2010–14 | 9.5% | 8.5% | 10.9% | 11.4% |
| 2015–19 | 12.9% | 8.3% | 10.9% | 11.1% |
| 2020–24 | 9.6% | 5.9% | 9.4% | 9.6% |
| Change | +1.3 pts | −2.9 pts | −2.4 pts | −1.8 pts |
Just as many homes sit empty in ZIP 78621 as nationally: 9.6%. The rate is higher than in the Austin area as a whole (5.9%). Vacancy is up 1.3 points from 2006–10, even as the national rate fell.
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 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 1987 | 1990 | 1983 | 1974 |
| 2010–14 | 1990 | 1992 | 1985 | 1975 |
| 2015–19 | 1991 | 1995 | 1987 | 1977 |
| 2020–24 | 2000 | 2000 | 1992 | 1980 |
| Change | +13 | +10 | +8 | +6 |
ZIP 78621 has newer housing than the country as a whole: the median home was built in 2000, versus 1980 nationally. The median year built has moved up from 1987 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northwest, while the center has the oldest housing.
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 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | $929 | $1,064 | $921 | $965 |
| 2010–14 | $936 | $1,155 | $1,005 | $1,040 |
| 2015–19 | $1,062 | $1,428 | $1,178 | $1,213 |
| 2020–24 | $1,442 | $1,911 | $1,560 | $1,571 |
| Change | +$513 | +$847 | +$639 | +$606 |
Rent in ZIP 78621 runs $1,442 a month at the median, utilities included, below the U.S. median of $1,571. Rent has climbed $513 a month since 2006–10, up 55%, a slower climb than the nation's. The typical renter here spends 26.9% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Rents run highest in the west and lowest in the southeast.
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 78621
Bachelor's degrees in ZIP 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 16.1% | 38.3% | 27.0% | 28.4% |
| 2010–14 | 16.9% | 40.3% | 27.9% | 29.6% |
| 2015–19 | 17.9% | 44.2% | 30.0% | 32.1% |
| 2020–24 | 24.1% | 50.4% | 34.0% | 35.6% |
| Change | +8.1 pts | +12.1 pts | +7.1 pts | +7.2 pts |
College degrees are relatively uncommon in ZIP 78621: 24.1% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. The share with a degree has risen 8.1 points since 2006–10, mirroring the country. College graduates are most concentrated in the southeast and least in the west.
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 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 80.4% | 87.6% | 80.7% | 84.9% |
| 2010–14 | 79.8% | 88.3% | 82.0% | 86.1% |
| 2015–19 | 76.6% | 89.9% | 83.6% | 87.7% |
| 2020–24 | 78.3% | 91.6% | 85.8% | 89.3% |
| Change | −2.1 pts | +4.0 pts | +5.1 pts | +4.3 pts |
More than one in five adults in ZIP 78621 never finished high school, well above the national share: only 78.3% have a diploma or equivalent, against 89.3% nationally. Since 2006–10, the share with a diploma has fallen 2.1 points, even as the national rate rose.
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 78621
| Period | ZIP 78621 | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.9% | 6.4% | 7.0% | 8.1% |
| 2010–14 | 5.6% | 6.9% | 7.7% | 9.4% |
| 2015–19 | 6.7% | 4.3% | 5.1% | 5.6% |
| 2020–24 | 4.9% | 4.3% | 5.3% | 5.4% |
| Change | −1.1 pts | −2.2 pts | −1.7 pts | −2.7 pts |
At 4.9%, unemployment in ZIP 78621 is close to the national rate of 5.4%. Unemployment is down 1.1 points from 2006–10, in line with the national trend. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's 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 78621 compared with nearby ZIP codes
| ZIP code | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| ZIP 78621 | 3.00 | 35.9 | 15.1% | 21.3% | 9.6% | 2000 | $1,442 | 24.1% | 78.3% | 4.9% |
| ZIP 78653 | 2.82 | 33.1 | 13.9% | 15.9% | 4.9% | 2013 | $1,875 | 35.5% | 85.9% | 5.0% |
| ZIP 78615 | 2.84 | 34.9 | 8.2% | 14.8% | 5.4% | 2011 | $1,915 | 40.5% | 90.9% | 2.5% |
| ZIP 78650 | 3.05 | 42.4 | 7.4% | 6.8% | 14.4% | 1996 | $1,293 | 23.3% | 89.6% | 5.6% |
| ZIP 78725 | 2.50 | 36.8 | 4.8% | 28.9% | 1.7% | 2004 | $2,174 | 33.8% | 88.8% | 3.9% |
| ZIP 78724 | 2.90 | 31.9 | 20.0% | 37.7% | 4.6% | 2004 | $1,688 | 32.4% | 76.7% | 6.4% |
| ZIP 78754 | 2.47 | 33.7 | 8.9% | 45.7% | 4.5% | 2008 | $1,745 | 42.9% | 87.8% | 1.7% |
| ZIP 78660 | 2.77 | 35.7 | 10.6% | 33.5% | 4.7% | 2009 | $2,060 | 46.4% | 93.2% | 4.5% |
| ZIP 78753 | 2.35 | 34.7 | 15.0% | 66.8% | 4.9% | 1993 | $1,581 | 41.8% | 83.2% | 5.0% |
| ZIP 78723 | 2.28 | 35.4 | 9.6% | 51.4% | 6.2% | 1990 | $1,890 | 60.9% | 90.6% | 5.6% |
| ZIP 78721 | 2.32 | 34.8 | 18.5% | 45.1% | 7.5% | 1985 | $1,726 | 49.4% | 82.2% | 8.2% |
All figures 2020–24.
Zip codes with similar populations: 29801, SC · 32563, FL · 32901, FL · 55123, MN · 55426, MN · 55126, MN · 01830, MA · 56303, MN · 60452, IL · 60560, IL
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 78621. 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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