Population 1,261 · Census ACS 2020–24
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Population and households in Diablo
Household size in Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.90 | 2.74 | 3.04 | 2.68 |
| 2010–14 | 2.46 | 2.79 | 3.10 | 2.73 |
| 2015–19 | 2.84 | 2.83 | 3.09 | 2.71 |
| 2020–24 | 2.54 | 2.75 | 3.01 | 2.65 |
| Change | −0.36 | +0.01 | −0.03 | −0.03 |
Households in Diablo run a little small, averaging 2.54 people against 2.65 nationally, which usually means more singles and couples and fewer children. Since 2006–10, household size has dropped from 2.90, but in a place this small, survey estimates can swing a lot from one release to the next.
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 Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 45.0 | 38.6 | 35.8 | 37.7 |
| 2010–14 | 49.5 | 39.4 | 36.8 | 38.6 |
| 2015–19 | 48.4 | 40.1 | 37.9 | 39.6 |
| 2020–24 | 47.5 | 41.3 | 39.0 | 40.1 |
| Change | +2.5 | +2.7 | +3.1 | +2.3 |
Diablo skews older: half of its residents are older than 47.5, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families.
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 Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.8% | 10.3% | 13.5% | 12.3% |
| 2010–14 | 2.0% | 9.9% | 13.5% | 12.3% |
| 2015–19 | 6.7% | 9.1% | 12.3% | 11.6% |
| 2020–24 | 2.1% | 8.8% | 12.3% | 11.6% |
| Change | −2.7 pts | −1.5 pts | −1.2 pts | −0.6 pts |
Single-parent households are relatively rare in Diablo: 2.1% of households, against 11.6% nationally.
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 Diablo
Renters in Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.0% | 43.7% | 42.6% | 33.3% |
| 2010–14 | 6.4% | 46.2% | 45.2% | 35.6% |
| 2015–19 | 4.4% | 45.3% | 45.2% | 36.0% |
| 2020–24 | 9.4% | 44.5% | 44.1% | 34.8% |
| Change | +4.4 pts | +0.8 pts | +1.5 pts | +1.5 pts |
Only 9.4% of households in Diablo rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 35.0% have no mortgage at all, below the national share of 39.8%.
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 Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.4% | 8.6% | 8.7% | 11.4% |
| 2010–14 | 2.4% | 7.1% | 8.1% | 11.4% |
| 2015–19 | 2.3% | 6.5% | 7.5% | 11.1% |
| 2020–24 | 3.6% | 7.5% | 7.3% | 9.6% |
| Change | +1.1 pts | −1.1 pts | −1.4 pts | −1.8 pts |
Only 3.6% of homes in Diablo are vacant, far below the national rate of 9.6%, which usually means strong demand for housing.
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 Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 1968 | 1964 | 1972 | 1974 |
| 2010–14 | 1972 | 1965 | 1973 | 1975 |
| 2015–19 | 1969 | 1966 | 1974 | 1977 |
| 2020–24 | 1971 | 1968 | 1976 | 1980 |
| Change | +3 | +4 | +4 | +6 |
Diablo is a place of older homes: half were built before 1971, while the national median is 1980. That means established neighborhoods, and more houses that may need updating. The picture is much the same across the San Francisco area.
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 Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,903 | $1,452 | $1,298 | $965 |
| 2010–14 | $1,922 | $1,551 | $1,379 | $1,040 |
| 2015–19 | $2,204 | $2,139 | $1,721 | $1,213 |
| 2020–24 | $3,440 | $2,666 | $2,229 | $1,571 |
| Change | +$1,537 | +$1,214 | +$931 | +$606 |
A typical rental in Diablo costs $3,440 a month with utilities, well above the national median of $1,571. The typical renter here spends 23.1% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally.
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 Diablo
Bachelor's degrees in Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 61.5% | 42.5% | 29.1% | 28.4% |
| 2010–14 | 64.6% | 44.1% | 30.1% | 29.6% |
| 2015–19 | 75.1% | 48.9% | 32.9% | 32.1% |
| 2020–24 | 75.9% | 52.2% | 36.3% | 35.6% |
| Change | +14.4 pts | +9.7 pts | +7.1 pts | +7.2 pts |
College graduates are unusually common in Diablo: 75.9% 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.
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 Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 97.4% | 86.8% | 79.9% | 84.9% |
| 2010–14 | 99.3% | 87.5% | 80.7% | 86.1% |
| 2015–19 | 99.4% | 88.8% | 82.6% | 87.7% |
| 2020–24 | 98.9% | 89.1% | 84.2% | 89.3% |
| Change | +1.5 pts | +2.3 pts | +4.3 pts | +4.3 pts |
Finishing high school is nearly universal in Diablo: 98.9% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%.
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 Diablo
| Period | Diablo | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.2% | 7.8% | 9.2% | 8.1% |
| 2010–14 | 1.9% | 8.9% | 11.3% | 9.4% |
| 2015–19 | 2.0% | 4.6% | 6.3% | 5.6% |
| 2020–24 | 3.5% | 5.8% | 6.6% | 5.4% |
| Change | −1.7 pts | −2.0 pts | −2.6 pts | −2.7 pts |
Unemployment in Diablo runs below the national rate: 3.5% of the labor force was out of work and looking, against 5.4% nationally. 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).
Diablo 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Diablo | 2.54 | 47.5 | 2.1% | 9.4% | 3.6% | 1971 | $3,440 | 75.9% | 98.9% | 3.5% |
| Danville | 2.88 | 45.5 | 5.4% | 14.3% | 3.6% | 1985 | $3,323 | 73.0% | 97.9% | 4.7% |
| Alamo | 2.85 | 49.6 | 3.5% | 8.2% | 5.4% | 1977 | $3,501 | 75.8% | 97.9% | 3.6% |
| San Ramon | 2.92 | 42.1 | 6.1% | 28.8% | 3.5% | 1993 | $3,035 | 71.9% | 97.1% | 5.0% |
| Castle Hill | 2.68 | 45.7 | 6.6% | 5.1% | 3.0% | 1966 | $3,501 | 87.1% | 100.0% | 0.0% |
| Clayton | 2.80 | 43.0 | 10.8% | 12.6% | 1.9% | 1981 | $3,111 | 55.5% | 98.3% | 5.9% |
| Walnut Creek | 2.27 | 46.2 | 5.2% | 38.1% | 3.8% | 1973 | $2,772 | 70.6% | 97.2% | 5.5% |
| Concord | 2.69 | 40.7 | 9.6% | 38.5% | 4.2% | 1969 | $2,483 | 37.5% | 87.3% | 5.4% |
| Lafayette | 2.66 | 45.5 | 6.1% | 23.2% | 4.2% | 1964 | $3,100 | 78.8% | 99.0% | 4.9% |
| Moraga | 2.77 | 41.2 | 4.8% | 15.9% | 5.0% | 1972 | $3,154 | 80.6% | 98.6% | 6.5% |
| Dublin | 2.90 | 38.1 | 6.0% | 34.6% | 4.5% | 2001 | $3,191 | 70.2% | 95.1% | 3.8% |
All figures 2020–24.
Cities with similar populations: Williamsburg, IN · White Creek, NY · Barrackville, WV · Coverdale Crossroads, DE · Crestone, CO · Benton, WI · Clarence, IA · Bradford Woods, PA · O'Brien, OR · Montgomery, WV
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 Diablo. 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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