Emerald Lake Hills, Redwood City, CA Demographics

Population 6,538 · Census ACS 2020–24

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Median age by neighborhoodHistory and comparison ↓︎
Emerald Lake Hills, Redwood City, CA map of median age by neighborhood
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Population and households in Emerald Lake Hills

Household size in Emerald Lake Hills

Household size, people per household
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–102.672.632.743.042.68
2010–142.712.772.793.102.73
2015–192.812.772.833.092.71
2020–242.772.782.753.012.65
Change+0.11+0.15+0.01−0.03−0.03
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The typical household in Emerald Lake Hills holds 2.77 people, slightly more than the U.S. average of 2.65. Redwood City as a whole looks much the same. Since 2006–10, household size has climbed from 2.67, even as the national average fell.

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 Emerald Lake Hills

Median age, years
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–1045.338.338.635.837.7
2010–1446.938.739.436.838.6
2015–1947.139.040.137.939.6
2020–2444.339.741.339.040.1
Change−1.0+1.4+2.7+3.1+2.3
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Emerald Lake Hills skews older: half of its residents are older than 44.3, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. The median age has dropped from 45.3 in 2006–10, even as the national median rose.

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 Emerald Lake Hills

Single-parent households, % of households
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–102.9%10.6%10.3%13.5%12.3%
2010–144.2%9.2%9.9%13.5%12.3%
2015–194.7%8.5%9.1%12.3%11.6%
2020–243.7%8.3%8.8%12.3%11.6%
Change+0.8 pts−2.3 pts−1.5 pts−1.2 pts−0.6 pts
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Single-parent households are relatively rare in Emerald Lake Hills: 3.7% of households, against 11.6% nationally. The single-parent share is up 0.8 points from 2006–10, even as the national share fell.

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 Emerald Lake Hills

Renters in Emerald Lake Hills

Renters, % of occupied homes
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–106.8%43.6%43.7%42.6%33.3%
2010–1411.1%44.6%46.2%45.2%35.6%
2015–1913.1%46.9%45.3%45.2%36.0%
2020–2411.4%48.1%44.5%44.1%34.8%
Change+4.6 pts+4.5 pts+0.8 pts+1.5 pts+1.5 pts
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Only 11.4% of households in Emerald Lake Hills rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 28.5% have no mortgage at all, well below the national share of 39.8%. Since 2006–10, the renter share has risen 4.6 points, 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 Emerald Lake Hills

Vacant homes, % of all homes
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–104.5%6.1%8.6%8.7%11.4%
2010–145.1%5.7%7.1%8.1%11.4%
2015–193.8%4.2%6.5%7.5%11.1%
2020–244.7%7.1%7.5%7.3%9.6%
Change+0.1 pts+1.1 pts−1.1 pts−1.4 pts−1.8 pts
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Only 4.7% of homes in Emerald Lake Hills are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Vacancy is little changed from 2006–10, while 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 Emerald Lake Hills

Age of homes, median year built
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–1019641965196419721974
2010–1419671966196519731975
2015–1919701969196619741977
2020–2419751970196819761980
Change+12+5+4+4+6
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Housing in Emerald Lake Hills leans a little older: the median home dates to 1975, against 1980 nationally. Locally, though, homes here are newer than in Redwood City as a whole, where the median home dates to 1970. The median year built has moved up from 1964 in 2006–10, a sign of steady new building. Newer construction is concentrated in the center, while the northeast 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 Emerald Lake Hills

Rent, per month
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–10$1,937$1,552$1,452$1,298$965
2010–14$1,878$1,642$1,551$1,379$1,040
2015–19$2,896$2,576$2,139$1,721$1,213
2020–24$3,234$3,033$2,666$2,229$1,571
Change+$1,297+$1,480+$1,214+$931+$606
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Rent in Emerald Lake Hills runs $3,234 a month at the median, utilities included, well above the U.S. median of $1,571. Rents are up $1,297 a month from 2006–10, a 67% jump, faster than rents rose nationally. Rent takes 28.1% of the typical renter's income, just under the 30% mark often used to define affordable rent. Renters on a budget will find the lowest rents in the northeast; the highest are 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 Emerald Lake Hills

Bachelor's degrees in Emerald Lake Hills

Bachelor's degrees, % of adults 25+
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–1066.6%40.6%42.5%29.1%28.4%
2010–1464.6%42.5%44.1%30.1%29.6%
2015–1970.4%51.4%48.9%32.9%32.1%
2020–2476.2%55.4%52.2%36.3%35.6%
Change+9.5 pts+14.8 pts+9.7 pts+7.1 pts+7.2 pts
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Emerald Lake Hills is highly educated: about three-quarters of adults 25 and older (76.2%) hold at least a bachelor's degree, far above the national share of 35.6%. The share with a degree is up 9.5 points from 2006–10, in line with the national trend.

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 Emerald Lake Hills

High school graduates, % of adults 25+
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–1095.8%85.4%86.8%79.9%84.9%
2010–1497.0%85.5%87.5%80.7%86.1%
2015–1998.4%87.7%88.8%82.6%87.7%
2020–2498.3%87.4%89.1%84.2%89.3%
Change+2.4 pts+2.0 pts+2.3 pts+4.3 pts+4.3 pts
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Finishing high school is nearly universal in Emerald Lake Hills: 98.3% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma has risen 2.4 points since 2006–10, in line with the national trend.

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 Emerald Lake Hills

Unemployment, % of the labor force
PeriodEmerald Lake HillsRedwood CitySan Francisco areaCaliforniaU.S.
2006–104.4%5.9%7.8%9.2%8.1%
2010–145.5%6.5%8.9%11.3%9.4%
2015–192.1%3.2%4.6%6.3%5.6%
2020–243.3%4.3%5.8%6.6%5.4%
Change−1.1 pts−1.6 pts−2.0 pts−2.6 pts−2.7 pts
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Unemployment in Emerald Lake Hills has been low: just 3.3% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment is down 1.1 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).

Emerald Lake Hills compared with nearby neighborhoods

NeighborhoodHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
Emerald Lake Hills2.7744.33.7%11.4%4.7%1975$3,23476.2%98.3%3.3%
Farm Hills2.8442.63.4%12.4%2.2%1963$3,38174.4%97.8%4.6%
Roosevelt-San Francisco2.6044.38.2%42.5%6.5%1954$3,03455.0%90.2%5.2%
Centennial2.0634.63.9%85.6%6.0%1997$3,23763.0%87.0%2.2%
Staumbaugh Heller2.9833.112.7%84.9%5.1%1968$2,49030.1%65.0%2.2%
Redwood Village3.2838.817.5%61.0%9.7%1965$2,40322.3%71.4%2.3%
Fair Oaks4.1633.413.5%54.5%5.5%1959$2,48629.8%74.3%8.1%
West Atherton2.6140.04.4%30.3%16.6%1962$3,22372.4%94.5%5.3%
Friendly Acres3.7433.49.9%45.5%6.3%1968$2,21720.8%70.2%5.5%
Sharon Heights2.6845.75.4%23.0%19.5%1969$3,50185.1%98.4%3.8%
Downtown Menlo Park1.8943.17.0%86.0%12.7%1969$2,85176.7%93.1%1.4%

All figures 2020–24.

Neighborhoods with similar populations: Viola, Monsey, NY · Coronado, Kansas City, KS · Mt. Baker, Seattle, WA · Sauganash, Chicago, IL · San Mateo, San Juan, PR · Saint Joseph, Milwaukee, WI · Rosedale, Kansas City, KS · Reservoir, Little Rock, AR · Park Santiago, Santa Ana, CA · Park Crossing, Charlotte, NC

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 Emerald Lake Hills. 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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