Population 15,127 · Census ACS 2020–24
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Population and households in Discovery Bay
Household size in Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.93 | 2.74 | 3.04 | 2.68 |
| 2010–14 | 2.99 | 2.79 | 3.10 | 2.73 |
| 2015–19 | 3.07 | 2.83 | 3.09 | 2.71 |
| 2020–24 | 2.88 | 2.75 | 3.01 | 2.65 |
| Change | −0.06 | +0.01 | −0.03 | −0.03 |
The typical household in Discovery Bay holds 2.88 people, more than the U.S. average of 2.65. Since 2006–10, household size has edged down from 2.93, as it has nationally. Households are largest in the north and smallest in the east.
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 Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 38.9 | 38.6 | 35.8 | 37.7 |
| 2010–14 | 40.8 | 39.4 | 36.8 | 38.6 |
| 2015–19 | 42.5 | 40.1 | 37.9 | 39.6 |
| 2020–24 | 45.4 | 41.3 | 39.0 | 40.1 |
| Change | +6.5 | +2.7 | +3.1 | +2.3 |
Discovery Bay skews older: half of its residents are older than 45.4, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. Since 2006–10, the median age has climbed from 38.9, as it has nationally.
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 Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.0% | 10.3% | 13.5% | 12.3% |
| 2010–14 | 8.9% | 9.9% | 13.5% | 12.3% |
| 2015–19 | 9.2% | 9.1% | 12.3% | 11.6% |
| 2020–24 | 7.5% | 8.8% | 12.3% | 11.6% |
| Change | −2.6 pts | −1.5 pts | −1.2 pts | −0.6 pts |
Single-parent households are relatively rare in Discovery Bay: 7.5% of households, against 11.6% nationally. Since 2006–10, the single-parent share has fallen 2.6 points, a much bigger shift than 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 Discovery Bay
Renters in Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 15.8% | 43.7% | 42.6% | 33.3% |
| 2010–14 | 20.8% | 46.2% | 45.2% | 35.6% |
| 2015–19 | 16.8% | 45.3% | 45.2% | 36.0% |
| 2020–24 | 10.2% | 44.5% | 44.1% | 34.8% |
| Change | −5.6 pts | +0.8 pts | +1.5 pts | +1.5 pts |
Discovery Bay is overwhelmingly a place of homeowners: only 10.2% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 23.0% have no mortgage at all, well below the national share of 39.8%. Since 2006–10, the renter share has fallen 5.6 points, 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 Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 14.8% | 8.6% | 8.7% | 11.4% |
| 2010–14 | 8.3% | 7.1% | 8.1% | 11.4% |
| 2015–19 | 5.9% | 6.5% | 7.5% | 11.1% |
| 2020–24 | 8.6% | 7.5% | 7.3% | 9.6% |
| Change | −6.2 pts | −1.1 pts | −1.4 pts | −1.8 pts |
About as many homes sit empty in Discovery Bay as nationally: 8.6%, against 9.6%. Vacancy has fallen 6.2 points since 2006–10, a much bigger shift than 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 Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 1993 | 1964 | 1972 | 1974 |
| 2010–14 | 1994 | 1965 | 1973 | 1975 |
| 2015–19 | 1996 | 1966 | 1974 | 1977 |
| 2020–24 | 1997 | 1968 | 1976 | 1980 |
| Change | +4 | +4 | +4 | +6 |
Much of the housing in Discovery Bay is relatively new: half of its homes were built after 1997, compared with 1980 for the U.S. as a whole. The median year built has moved up from 1993 in 2006–10, a sign of steady new building. The newest homes are mostly in the north, the oldest in the east. Of the 689 California cities with 5,000+ people, only 38 have newer 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 Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,735 | $1,452 | $1,298 | $965 |
| 2010–14 | $1,955 | $1,551 | $1,379 | $1,040 |
| 2015–19 | $2,616 | $2,139 | $1,721 | $1,213 |
| 2020–24 | $2,885 | $2,666 | $2,229 | $1,571 |
| Change | +$1,149 | +$1,214 | +$931 | +$606 |
Rent in Discovery Bay runs $2,885 a month at the median, utilities included, well above the U.S. median of $1,571. Rent has climbed $1,149 a month since 2006–10, up 66%, faster than rents rose nationally. The typical renter here spends 41.3% of household income on rent, well over the 30% mark often used to define affordable rent, so many renters here are stretched. The priciest rents are in the north; the most affordable are in the east.
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 Discovery Bay
Bachelor's degrees in Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 29.0% | 42.5% | 29.1% | 28.4% |
| 2010–14 | 31.2% | 44.1% | 30.1% | 29.6% |
| 2015–19 | 30.5% | 48.9% | 32.9% | 32.1% |
| 2020–24 | 32.5% | 52.2% | 36.3% | 35.6% |
| Change | +3.5 pts | +9.7 pts | +7.1 pts | +7.2 pts |
College degrees are a little less common in Discovery Bay than nationally: 32.5% of adults 25 and older have a bachelor's or higher, against 35.6%. Since 2006–10, the share with a degree has risen 3.5 points, mirroring the country. College graduates are most concentrated in the north and least in the southwest.
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 Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 94.4% | 86.8% | 79.9% | 84.9% |
| 2010–14 | 95.1% | 87.5% | 80.7% | 86.1% |
| 2015–19 | 96.0% | 88.8% | 82.6% | 87.7% |
| 2020–24 | 94.5% | 89.1% | 84.2% | 89.3% |
| Change | +0.1 pts | +2.3 pts | +4.3 pts | +4.3 pts |
High school completion is high in Discovery Bay: 94.5% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Discovery Bay has a higher share of high school graduates than most 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 Discovery Bay
| Period | Discovery Bay | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.4% | 7.8% | 9.2% | 8.1% |
| 2010–14 | 9.4% | 8.9% | 11.3% | 9.4% |
| 2015–19 | 4.0% | 4.6% | 6.3% | 5.6% |
| 2020–24 | 8.8% | 5.8% | 6.6% | 5.4% |
| Change | +0.5 pts | −2.0 pts | −2.6 pts | −2.7 pts |
Unemployment in Discovery Bay runs well above the national rate: 8.8% of the labor force was out of work and looking, against 5.4%. Discovery Bay has higher unemployment than the great majority of California cities. 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).
Discovery Bay 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Discovery Bay | 2.88 | 45.4 | 7.5% | 10.2% | 8.6% | 1997 | $2,885 | 32.5% | 94.5% | 8.8% |
| Byron | 3.18 | 45.1 | 13.7% | 39.2% | 3.2% | 1980 | $2,614 | 18.8% | 84.1% | 15.7% |
| Knightsen | 3.36 | 37.1 | 7.9% | 10.6% | 3.4% | 2004 | $2,414 | 25.0% | 84.3% | 10.9% |
| Brentwood | 3.20 | 40.7 | 10.4% | 18.1% | 3.5% | 2002 | $2,751 | 38.7% | 91.1% | 5.8% |
| Holt | 1.84 | 37.8 | 11.2% | 87.8% | 27.4% | 1979 | $678 | 11.2% | 58.5% | 5.6% |
| Oakley | 3.33 | 37.6 | 10.2% | 20.9% | 4.2% | 1998 | $2,168 | 26.2% | 89.4% | 5.4% |
| Bethel Island | 2.37 | 55.3 | 9.5% | 34.9% | 16.9% | 1970 | $1,908 | 18.2% | 68.4% | 35.6% |
| Antioch | 3.13 | 39.5 | 16.4% | 36.9% | 4.3% | 1984 | $2,625 | 24.0% | 85.1% | 7.5% |
| Bridgehead | 1.73 | 61.6 | 10.7% | 20.1% | 4.7% | 1983 | $1,250 | 10.0% | 92.1% | 10.5% |
| Country Club | 3.01 | 38.1 | 13.1% | 36.3% | 7.5% | 1959 | $1,712 | 14.5% | 81.8% | 9.8% |
| Clayton | 2.80 | 43.0 | 10.8% | 12.6% | 1.9% | 1981 | $3,111 | 55.5% | 98.3% | 5.9% |
All figures 2020–24.
Cities with similar populations: Holliston, MA · La Grande, OR · Key Biscayne, FL · Adelphi, MD · Jessup, MD · Irondale, AL · Huntingtown, MD · Hudson, NY · Hooksett, NH · Rio Linda, CA
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 Discovery Bay. 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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