Population 38,082 · Census ACS 2020–24
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Population and households in Walnut Valley
Household size in Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 3.28 | 3.13 | 3.14 | 3.04 | 2.68 |
| 2010–14 | 3.35 | 3.25 | 3.20 | 3.10 | 2.73 |
| 2015–19 | 3.31 | 3.12 | 3.16 | 3.09 | 2.71 |
| 2020–24 | 3.16 | 2.99 | 3.01 | 3.01 | 2.65 |
| Change | −0.12 | −0.14 | −0.13 | −0.03 | −0.03 |
Households in Walnut Valley are large by national standards, averaging 3.16 people against 2.65 for the U.S. That usually means more families with children at home. Household size has dropped from 3.28 in 2006–10, a much bigger shift than nationally.
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 Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 40.7 | 40.6 | 35.6 | 35.8 | 37.7 |
| 2010–14 | 41.6 | 41.6 | 36.7 | 36.8 | 38.6 |
| 2015–19 | 43.2 | 43.5 | 38.0 | 37.9 | 39.6 |
| 2020–24 | 44.7 | 46.0 | 39.5 | 39.0 | 40.1 |
| Change | +4.0 | +5.4 | +4.0 | +3.1 | +2.3 |
With a median age of 44.7, Walnut Valley is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees. Since 2006–10, the median age has climbed from 40.7, in line with the national trend. The youngest areas are in the center, the oldest in the north.
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 Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 8.6% | 8.3% | 14.3% | 13.5% | 12.3% |
| 2010–14 | 9.3% | 8.7% | 14.1% | 13.5% | 12.3% |
| 2015–19 | 7.9% | 7.1% | 12.5% | 12.3% | 11.6% |
| 2020–24 | 8.2% | 8.7% | 12.3% | 12.3% | 11.6% |
| Change | −0.4 pts | +0.4 pts | −2.0 pts | −1.2 pts | −0.6 pts |
Single-parent households are relatively rare in Walnut Valley: 8.2% of households, against 11.6% nationally. The picture is much the same across Diamond Bar.
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 Walnut Valley
Renters in Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 15.2% | 16.2% | 48.8% | 42.6% | 33.3% |
| 2010–14 | 20.9% | 20.8% | 50.8% | 45.2% | 35.6% |
| 2015–19 | 22.5% | 24.1% | 51.4% | 45.2% | 36.0% |
| 2020–24 | 23.0% | 22.7% | 51.6% | 44.1% | 34.8% |
| Change | +7.8 pts | +6.5 pts | +2.8 pts | +1.5 pts | +1.5 pts |
Walnut Valley is largely a place of homeowners: only 23.0% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 38.6% have no mortgage at all, about the same as nationally. The renter share is up 7.8 points from 2006–10, a much bigger shift than 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 Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 4.6% | 3.7% | 7.0% | 8.7% | 11.4% |
| 2010–14 | 5.4% | 5.3% | 6.7% | 8.1% | 11.4% |
| 2015–19 | 5.2% | 5.2% | 6.6% | 7.5% | 11.1% |
| 2020–24 | 6.4% | 5.7% | 6.7% | 7.3% | 9.6% |
| Change | +1.8 pts | +2.0 pts | −0.3 pts | −1.4 pts | −1.8 pts |
Vacancy is on the low side in Walnut Valley: 6.4% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. Diamond Bar as a whole looks much the same. Vacancy is up 1.8 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 Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 1978 | 1979 | 1965 | 1972 | 1974 |
| 2010–14 | 1978 | 1978 | 1966 | 1973 | 1975 |
| 2015–19 | 1978 | 1979 | 1966 | 1974 | 1977 |
| 2020–24 | 1978 | 1978 | 1969 | 1976 | 1980 |
| Change | +0 | −0 | +4 | +4 | +6 |
Homes in Walnut Valley are about the same age as the nation's housing: the median home was built in 1978, versus 1980 nationally. Newer construction is concentrated in the north, while the west 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 Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | $1,693 | $1,717 | $1,328 | $1,298 | $965 |
| 2010–14 | $1,882 | $1,808 | $1,415 | $1,379 | $1,040 |
| 2015–19 | $2,311 | $2,203 | $1,755 | $1,721 | $1,213 |
| 2020–24 | $2,760 | $2,536 | $2,279 | $2,229 | $1,571 |
| Change | +$1,067 | +$819 | +$951 | +$931 | +$606 |
Rent in Walnut Valley runs $2,760 a month at the median, utilities included, well above the U.S. median of $1,571. Rents are up $1,067 a month from 2006–10, a 63% jump, roughly in step with the nation. Rent takes 36.9% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched. Rents run highest in the north and lowest in the south.
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 Walnut Valley
Bachelor's degrees in Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 48.2% | 48.4% | 29.7% | 29.1% | 28.4% |
| 2010–14 | 49.9% | 48.3% | 30.7% | 30.1% | 29.6% |
| 2015–19 | 54.1% | 55.4% | 33.7% | 32.9% | 32.1% |
| 2020–24 | 54.8% | 52.6% | 37.6% | 36.3% | 35.6% |
| Change | +6.7 pts | +4.2 pts | +7.9 pts | +7.1 pts | +7.2 pts |
College graduates are unusually common in Walnut Valley: 54.8% 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. Since 2006–10, the share with a degree has risen 6.7 points, as it has nationally.
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 Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 92.5% | 92.8% | 76.7% | 79.9% | 84.9% |
| 2010–14 | 91.4% | 91.6% | 77.7% | 80.7% | 86.1% |
| 2015–19 | 93.2% | 94.3% | 80.0% | 82.6% | 87.7% |
| 2020–24 | 92.7% | 92.2% | 82.1% | 84.2% | 89.3% |
| Change | +0.2 pts | −0.6 pts | +5.4 pts | +4.3 pts | +4.3 pts |
High school completion in Walnut Valley is above the national rate: 92.7% of adults have a diploma or equivalent, against 89.3%. Diamond Bar as a whole looks much the same.
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 Walnut Valley
| Period | Walnut Valley | Diamond Bar | Los Angeles area | California | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 5.5% | 5.1% | 8.5% | 9.2% | 8.1% |
| 2010–14 | 7.7% | 7.8% | 10.6% | 11.3% | 9.4% |
| 2015–19 | 4.7% | 5.6% | 5.8% | 6.3% | 5.6% |
| 2020–24 | 5.1% | 5.0% | 6.7% | 6.6% | 5.4% |
| Change | −0.4 pts | −0.1 pts | −1.7 pts | −2.6 pts | −2.7 pts |
At 5.1%, unemployment in Walnut Valley is close to the national rate of 5.4%. 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).
Walnut Valley compared with nearby neighborhoods
| Neighborhood | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Walnut Valley | 3.16 | 44.7 | 8.2% | 23.0% | 6.4% | 1978 | $2,760 | 54.8% | 92.7% | 5.1% |
| Downtown Pomona | 2.38 | 33.6 | 15.9% | 84.6% | 10.7% | 2000 | $1,765 | 26.6% | 69.4% | 8.7% |
| Edison Historic District | 3.82 | 32.1 | 20.5% | 67.4% | 5.7% | 1954 | $1,732 | 11.0% | 63.3% | 5.9% |
| Brea-Olinda | 2.84 | 39.9 | 6.2% | 41.2% | 6.1% | 1983 | $2,578 | 52.4% | 93.1% | 4.6% |
| Covina-Valley | 3.30 | 40.9 | 13.1% | 40.0% | 5.3% | 1964 | $2,021 | 25.8% | 84.0% | 7.8% |
| Charter Oak | 3.16 | 39.5 | 12.2% | 35.0% | 5.2% | 1968 | $2,383 | 31.6% | 89.6% | 6.5% |
| La Habra City | 3.18 | 40.3 | 11.3% | 38.4% | 4.6% | 1968 | $2,200 | 28.6% | 84.5% | 6.3% |
| Bassett | 4.16 | 40.1 | 14.6% | 29.4% | 5.8% | 1958 | $2,207 | 14.3% | 68.4% | 6.7% |
| Lowell | 2.75 | 40.8 | 10.3% | 39.4% | 5.4% | 1969 | $2,239 | 40.0% | 89.6% | 8.5% |
| Downtown Fullerton | 2.96 | 37.4 | 16.7% | 66.9% | 6.9% | 1976 | $2,097 | 31.4% | 81.7% | 5.0% |
| Northeast | 3.55 | 35.5 | 15.7% | 55.3% | 6.4% | 1971 | $2,315 | 21.5% | 77.0% | 6.3% |
All figures 2020–24.
Neighborhoods with similar populations: River Oaks, Houston, TX · Montebello, Denver, CO · Montecito Heights, Los Angeles, CA · Montello, Brockton, MA · Active Bethel, Eugene, OR · New Brighton, Staten Island, NY · North Arlington, Arlington, TX · North Cheyenne, Las Vegas, NV · North Dallas, Dallas, TX · Payne Phallen, St. Paul, MN
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 Walnut Valley. 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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