Population 19,482 · Census ACS 2020–24
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Population and households in Alum Rock
Household size in Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.00 | 2.97 | 3.04 | 2.68 |
| 2010–14 | 3.97 | 3.05 | 3.10 | 2.73 |
| 2015–19 | 4.09 | 3.07 | 3.09 | 2.71 |
| 2020–24 | 3.90 | 2.96 | 3.01 | 2.65 |
| Change | −0.10 | −0.00 | −0.03 | −0.03 |
Alum Rock is a place of big households: 3.90 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 dropped from 4.00, a much bigger shift than nationally. Only 35 of the 689 California cities with 5,000+ people have larger households.
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 Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 31.1 | 36.6 | 35.8 | 37.7 |
| 2010–14 | 33.8 | 37.6 | 36.8 | 38.6 |
| 2015–19 | 35.4 | 38.5 | 37.9 | 39.6 |
| 2020–24 | 39.5 | 39.4 | 39.0 | 40.1 |
| Change | +8.4 | +2.8 | +3.1 | +2.3 |
At 39.5, the median age in Alum Rock is close to the national median of 40.1, so its age mix looks much like the country's. The median age has climbed from 31.1 in 2006–10, a much bigger shift than nationally. Residents skew youngest in the southwest and oldest in the east.
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 Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 15.4% | 10.4% | 13.5% | 12.3% |
| 2010–14 | 14.7% | 9.9% | 13.5% | 12.3% |
| 2015–19 | 15.2% | 8.8% | 12.3% | 11.6% |
| 2020–24 | 14.5% | 9.0% | 12.3% | 11.6% |
| Change | −0.9 pts | −1.3 pts | −1.2 pts | −0.6 pts |
Single-parent households are more common in Alum Rock than nationally: 14.5%, against 11.6%. The single-parent share has edged down 0.9 points since 2006–10, in line with the national trend.
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 Alum Rock
Renters in Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 39.5% | 40.6% | 42.6% | 33.3% |
| 2010–14 | 46.3% | 42.9% | 45.2% | 35.6% |
| 2015–19 | 38.8% | 43.4% | 45.2% | 36.0% |
| 2020–24 | 40.4% | 44.5% | 44.1% | 34.8% |
| Change | +0.9 pts | +3.9 pts | +1.5 pts | +1.5 pts |
Renting is a bit more common in Alum Rock than nationally: 40.4% of households rent their homes, against 34.8% for the U.S. Even so, renters make up a smaller share here than in the wider San Jose area (44.5%). About a quarter of owners (24.4%) have paid off their mortgages, well below the national share of 39.8%. The renter share has edged up 0.9 points since 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 Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.4% | 6.2% | 8.7% | 11.4% |
| 2010–14 | 4.0% | 4.9% | 8.1% | 11.4% |
| 2015–19 | 3.9% | 5.6% | 7.5% | 11.1% |
| 2020–24 | 6.8% | 6.4% | 7.3% | 9.6% |
| Change | +0.4 pts | +0.2 pts | −1.4 pts | −1.8 pts |
Fewer homes sit empty in Alum Rock than nationally: 6.8%, against 9.6% for the U.S. The picture is much the same across the San Jose area.
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 Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 1961 | 1973 | 1972 | 1974 |
| 2010–14 | 1960 | 1974 | 1973 | 1975 |
| 2015–19 | 1960 | 1975 | 1974 | 1977 |
| 2020–24 | 1959 | 1977 | 1976 | 1980 |
| Change | −2 | +4 | +4 | +6 |
The housing in Alum Rock is old by national standards: the median home dates to 1959, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. Newer construction is concentrated in the southwest, while the center has the oldest housing. Only 37 of the 689 California cities with 5,000+ people have older homes.
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 Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,416 | $1,524 | $1,298 | $965 |
| 2010–14 | $1,537 | $1,670 | $1,379 | $1,040 |
| 2015–19 | $1,901 | $2,389 | $1,721 | $1,213 |
| 2020–24 | $2,543 | $2,873 | $2,229 | $1,571 |
| Change | +$1,127 | +$1,348 | +$931 | +$606 |
The median renter in Alum Rock pays $2,543 a month for rent and utilities, well above the national median of $1,571. Even so, rents here are lower than in the San Jose area as a whole ($2,873). Rents are up $1,127 a month from 2006–10, an 80% jump, faster than rents rose nationally. Rent takes 32.0% of the typical renter's income, just over the 30% mark often used to define affordable rent.
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 Alum Rock
Bachelor's degrees in Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 12.9% | 43.9% | 29.1% | 28.4% |
| 2010–14 | 13.5% | 46.5% | 30.1% | 29.6% |
| 2015–19 | 17.9% | 51.6% | 32.9% | 32.1% |
| 2020–24 | 23.5% | 55.3% | 36.3% | 35.6% |
| Change | +10.6 pts | +11.5 pts | +7.1 pts | +7.2 pts |
College degrees are relatively uncommon in Alum Rock: 23.5% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. Since 2006–10, the share with a degree has risen 10.6 points, mirroring the country.
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 Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 65.0% | 85.5% | 79.9% | 84.9% |
| 2010–14 | 68.0% | 86.4% | 80.7% | 86.1% |
| 2015–19 | 71.4% | 88.1% | 82.6% | 87.7% |
| 2020–24 | 68.8% | 89.0% | 84.2% | 89.3% |
| Change | +3.8 pts | +3.4 pts | +4.3 pts | +4.3 pts |
Just over three in ten adults in Alum Rock never finished high school, well above the national share: only 68.8% have a diploma or equivalent, against 89.3% nationally. Since 2006–10, the share with a diploma has risen 3.8 points, mirroring the country. Alum Rock has a lower share of high school graduates than at least four in five California cities.
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 Alum Rock
| Period | Alum Rock | San Jose area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.3% | 7.9% | 9.2% | 8.1% |
| 2010–14 | 14.2% | 8.9% | 11.3% | 9.4% |
| 2015–19 | 5.7% | 4.4% | 6.3% | 5.6% |
| 2020–24 | 4.5% | 4.9% | 6.6% | 5.4% |
| Change | −5.8 pts | −3.0 pts | −2.6 pts | −2.7 pts |
Unemployment in Alum Rock runs below the national rate: 4.5% of the labor force was out of work and looking, against 5.4% nationally. Unemployment is down 5.8 points from 2006–10, mirroring the country. 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).
Alum Rock compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Alum Rock | 3.90 | 39.5 | 14.5% | 40.4% | 6.8% | 1959 | $2,543 | 23.5% | 68.8% | 4.5% |
| Mount Hamilton | 2.86 | 47.5 | 3.2% | 20.5% | 11.5% | 1972 | $2,074 | 53.1% | 93.2% | 2.4% |
| San Jose area | 2.96 | 39.4 | 9.0% | 44.5% | 6.4% | 1977 | $2,873 | 55.3% | 89.0% | 4.9% |
| Milpitas | 3.09 | 38.6 | 7.9% | 43.3% | 4.8% | 1988 | $3,083 | 60.7% | 90.0% | 3.8% |
| Santa Clara | 2.57 | 36.3 | 5.1% | 58.4% | 6.7% | 1977 | $2,986 | 66.4% | 93.4% | 4.9% |
| Alviso | 2.95 | 47.6 | 3.8% | 26.8% | 6.8% | 1999 | $2,104 | 38.5% | 78.2% | 5.3% |
| Campbell | 2.60 | 40.5 | 10.7% | 48.5% | 7.0% | 1973 | $2,855 | 60.0% | 93.7% | 5.1% |
| Sunnyvale | 2.60 | 37.6 | 6.5% | 56.1% | 5.6% | 1977 | $3,105 | 69.6% | 94.5% | 4.8% |
| Coyote | 3.57 | 40.3 | 17.9% | 49.6% | 9.0% | 1974 | $2,168 | 19.5% | 77.5% | 4.1% |
| Cupertino | 2.80 | 42.2 | 4.5% | 40.7% | 6.4% | 1974 | $3,364 | 81.8% | 97.1% | 4.1% |
| Monte Sereno | 2.79 | 53.1 | 4.5% | 8.8% | 11.7% | 1965 | $3,077 | 81.1% | 98.5% | 5.5% |
All figures 2020–24.
Cities with similar populations: Westwood, NJ · Brigham City, UT · Broomall, PA · Greenfield, CA · Riverton, NJ · Grand Island, NY · Rocky River, OH · North Myrtle Beach, SC · Camden, SC · St. Joseph, MI
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 Alum Rock. 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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