Population 115 · Census ACS 2020–24
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Population and households in Castle Hill
Household size in Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.44 | 2.74 | 3.04 | 2.68 |
| 2010–14 | 2.37 | 2.79 | 3.10 | 2.73 |
| 2015–19 | 2.65 | 2.83 | 3.09 | 2.71 |
| 2020–24 | 2.68 | 2.75 | 3.01 | 2.65 |
| Change | +0.24 | +0.01 | −0.03 | −0.03 |
Households in Castle Hill average 2.68 people, about the same as the country as a whole (2.65). Household size has climbed from 2.44 in 2006–10, but in a place this small, much of that may be survey noise rather than real change.
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 Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 47.6 | 38.6 | 35.8 | 37.7 |
| 2010–14 | 54.6 | 39.4 | 36.8 | 38.6 |
| 2015–19 | 50.0 | 40.1 | 37.9 | 39.6 |
| 2020–24 | 45.7 | 41.3 | 39.0 | 40.1 |
| Change | −1.9 | +2.7 | +3.1 | +2.3 |
Castle Hill skews older: half of its residents are older than 45.7, 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 Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.0% | 10.3% | 13.5% | 12.3% |
| 2010–14 | 3.4% | 9.9% | 13.5% | 12.3% |
| 2015–19 | 3.2% | 9.1% | 12.3% | 11.6% |
| 2020–24 | 6.6% | 8.8% | 12.3% | 11.6% |
| Change | −3.4 pts | −1.5 pts | −1.2 pts | −0.6 pts |
Single-parent households are relatively rare in Castle Hill: 6.6% 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 Castle Hill
Renters in Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 20.8% | 43.7% | 42.6% | 33.3% |
| 2010–14 | 19.5% | 46.2% | 45.2% | 35.6% |
| 2015–19 | 25.2% | 45.3% | 45.2% | 36.0% |
| 2020–24 | 5.1% | 44.5% | 44.1% | 34.8% |
| Change | −15.7 pts | +0.8 pts | +1.5 pts | +1.5 pts |
Castle Hill is overwhelmingly a place of homeowners: only 5.1% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 38.9% have no mortgage at all, about the same as 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 Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.1% | 8.6% | 8.7% | 11.4% |
| 2010–14 | 3.4% | 7.1% | 8.1% | 11.4% |
| 2015–19 | 4.4% | 6.5% | 7.5% | 11.1% |
| 2020–24 | 3.0% | 7.5% | 7.3% | 9.6% |
| Change | −1.2 pts | −1.1 pts | −1.4 pts | −1.8 pts |
Empty homes are scarce in Castle Hill: just 3.0% sit vacant, compared with 9.6% nationally, a sign of a tight housing market.
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 Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 1970 | 1964 | 1972 | 1974 |
| 2010–14 | 1972 | 1965 | 1973 | 1975 |
| 2015–19 | 1972 | 1966 | 1974 | 1977 |
| 2020–24 | 1966 | 1968 | 1976 | 1980 |
| Change | −5 | +4 | +4 | +6 |
Castle Hill is a place of older homes: half were built before 1966, 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 Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | $962 | $1,452 | $1,298 | $965 |
| 2010–14 | $807 | $1,551 | $1,379 | $1,040 |
| 2015–19 | $1,634 | $2,139 | $1,721 | $1,213 |
| 2020–24 | $3,501 | $2,666 | $2,229 | $1,571 |
| Change | +$2,539 | +$1,214 | +$931 | +$606 |
A typical rental in Castle Hill costs $3,501 a month with utilities, well above the national median of $1,571. Rent takes 51.0% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched.
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 Castle Hill
Bachelor's degrees in Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 59.7% | 42.5% | 29.1% | 28.4% |
| 2010–14 | 64.1% | 44.1% | 30.1% | 29.6% |
| 2015–19 | 64.8% | 48.9% | 32.9% | 32.1% |
| 2020–24 | 87.1% | 52.2% | 36.3% | 35.6% |
| Change | +27.4 pts | +9.7 pts | +7.1 pts | +7.2 pts |
Castle Hill is highly educated: nearly nine in ten adults 25 and older (87.1%) hold at least a bachelor's degree, far above the national share of 35.6%.
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 Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 95.6% | 86.8% | 79.9% | 84.9% |
| 2010–14 | 95.7% | 87.5% | 80.7% | 86.1% |
| 2015–19 | 97.8% | 88.8% | 82.6% | 87.7% |
| 2020–24 | 100.0% | 89.1% | 84.2% | 89.3% |
| Change | +4.4 pts | +2.3 pts | +4.3 pts | +4.3 pts |
Finishing high school is nearly universal in Castle Hill: 100.0% 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 Castle Hill
| Period | Castle Hill | San Francisco area | California | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.2% | 7.8% | 9.2% | 8.1% |
| 2010–14 | 10.5% | 8.9% | 11.3% | 9.4% |
| 2015–19 | 3.9% | 4.6% | 6.3% | 5.6% |
| 2020–24 | 0.0% | 5.8% | 6.6% | 5.4% |
| Change | −6.2 pts | −2.0 pts | −2.6 pts | −2.7 pts |
The survey found almost no one in Castle Hill out of work and looking, against 5.4% of the labor force 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).
Castle Hill 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Castle Hill | 2.68 | 45.7 | 6.6% | 5.1% | 3.0% | 1966 | $3,501 | 87.1% | 100.0% | 0.0% |
| Walnut Creek | 2.27 | 46.2 | 5.2% | 38.1% | 3.8% | 1973 | $2,772 | 70.6% | 97.2% | 5.5% |
| Alamo | 2.85 | 49.6 | 3.5% | 8.2% | 5.4% | 1977 | $3,501 | 75.8% | 97.9% | 3.6% |
| 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% |
| Reliez Valley | 2.91 | 48.5 | 6.2% | 5.3% | 1.8% | 1970 | $3,468 | 80.8% | 98.9% | 3.9% |
| Pleasant Hill | 2.57 | 43.3 | 10.3% | 37.7% | 7.4% | 1970 | $2,742 | 52.0% | 95.2% | 5.0% |
| Diablo | 2.54 | 47.5 | 2.1% | 9.4% | 3.6% | 1971 | $3,440 | 75.9% | 98.9% | 3.5% |
| Concord | 2.69 | 40.7 | 9.6% | 38.5% | 4.2% | 1969 | $2,483 | 37.5% | 87.3% | 5.4% |
| Orinda | 2.74 | 48.0 | 4.7% | 10.1% | 3.5% | 1965 | $2,489 | 84.9% | 98.2% | 3.6% |
| Canyon | 2.39 | 44.2 | 4.8% | 7.0% | 4.1% | 1970 | $3,267 | 83.1% | 98.9% | 3.9% |
All figures 2020–24.
Cities with similar populations: Ruth, CA · Kenna, NM · Keota, CO · Saude, IA · Kimery, TN · Saronville, NE · Sargent, TX · Sapelo Island, GA · Sanger, ND · Klahr, PA
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 Castle Hill. 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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