Population 57,021 · Census ACS 2020–24
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Population and households in Sammamish
Household size in Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.05 | 2.52 | 2.56 | 2.68 |
| 2010–14 | 3.05 | 2.59 | 2.62 | 2.73 |
| 2015–19 | 3.01 | 2.62 | 2.62 | 2.71 |
| 2020–24 | 3.01 | 2.60 | 2.61 | 2.65 |
| Change | −0.04 | +0.09 | +0.05 | −0.03 |
Households in Sammamish are large by national standards, averaging 3.01 people against 2.65 for the U.S. That usually means more families with children at home. Since 2006–10, household size has edged down from 3.05, mirroring the country.
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 Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 37.4 | 37.5 | 38.0 | 37.7 |
| 2010–14 | 38.9 | 38.1 | 38.7 | 38.6 |
| 2015–19 | 40.3 | 38.5 | 39.3 | 39.6 |
| 2020–24 | 41.2 | 38.8 | 39.6 | 40.1 |
| Change | +3.8 | +1.3 | +1.6 | +2.3 |
Half of the people in Sammamish are younger than 41.2 and half are older, close to the national median of 40.1. The population here is older than in the Seattle area as a whole, where the median age is 38.8. Since 2006–10, the median age has climbed from 37.4, mirroring the country.
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 Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.1% | 10.3% | 10.9% | 12.3% |
| 2010–14 | 6.0% | 10.0% | 10.6% | 12.3% |
| 2015–19 | 5.5% | 9.2% | 10.1% | 11.6% |
| 2020–24 | 4.4% | 9.1% | 10.1% | 11.6% |
| Change | −0.7 pts | −1.2 pts | −0.8 pts | −0.6 pts |
Single parents head only 4.4% of households in Sammamish, well below the national share of 11.6%. The single-parent share has edged down 0.7 points since 2006–10, mirroring the country. Of the 219 Washington cities with 5,000+ people, only 16 have a lower share of single-parent households.
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 Sammamish
Renters in Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 11.1% | 37.7% | 35.2% | 33.3% |
| 2010–14 | 12.8% | 40.0% | 37.3% | 35.6% |
| 2015–19 | 12.7% | 39.9% | 37.0% | 36.0% |
| 2020–24 | 15.0% | 40.0% | 36.2% | 34.8% |
| Change | +3.9 pts | +2.3 pts | +1.0 pts | +1.5 pts |
Sammamish is overwhelmingly a place of homeowners: only 15.0% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Just over a quarter of owners (26.2%) have paid off their mortgages, well below the national share of 39.8%. Since 2006–10, the renter share has risen 3.9 points, in line with the national trend.
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 Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.3% | 7.9% | 9.2% | 11.4% |
| 2010–14 | 4.6% | 7.8% | 9.2% | 11.4% |
| 2015–19 | 4.2% | 6.8% | 8.2% | 11.1% |
| 2020–24 | 4.0% | 6.6% | 7.6% | 9.6% |
| Change | −2.3 pts | −1.3 pts | −1.6 pts | −1.8 pts |
Empty homes are scarce in Sammamish: just 4.0% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. Since 2006–10, vacancy has fallen 2.3 points, as it has nationally. Of the 219 Washington cities with 5,000+ people, only 20 have a lower vacancy rate.
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 Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 1992 | 1977 | 1977 | 1974 |
| 2010–14 | 1993 | 1978 | 1979 | 1975 |
| 2015–19 | 1994 | 1980 | 1980 | 1977 |
| 2020–24 | 1995 | 1983 | 1984 | 1980 |
| Change | +3 | +7 | +6 | +6 |
Much of the housing in Sammamish is relatively new: half of its homes were built after 1995, compared with 1980 for the U.S. as a whole. The median year built has moved up from 1992 in 2006–10, a sign of steady new building. The newest homes are mostly in the east, the oldest in the northwest.
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 Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,598 | $1,162 | $1,018 | $965 |
| 2010–14 | $1,763 | $1,284 | $1,127 | $1,040 |
| 2015–19 | $2,424 | $1,644 | $1,390 | $1,213 |
| 2020–24 | $3,033 | $2,193 | $1,875 | $1,571 |
| Change | +$1,435 | +$1,031 | +$858 | +$606 |
The median renter in Sammamish pays $3,033 a month for rent and utilities, well above the national median of $1,571. Rents are up $1,435 a month from 2006–10, a 90% jump, faster than rents rose nationally. The typical renter here spends 28.4% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Only one other Washington city with 5,000+ people has higher rents.
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 Sammamish
Bachelor's degrees in Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 68.8% | 36.7% | 31.0% | 28.4% |
| 2010–14 | 71.6% | 38.0% | 32.1% | 29.6% |
| 2015–19 | 75.1% | 42.3% | 35.5% | 32.1% |
| 2020–24 | 78.6% | 46.3% | 38.8% | 35.6% |
| Change | +9.9 pts | +9.6 pts | +7.8 pts | +7.2 pts |
Sammamish is highly educated: about eight in ten adults 25 and older (78.6%) hold at least a bachelor's degree, far above the national share of 35.6%. The share with a degree has risen 9.9 points since 2006–10, in line with the national trend. Only one other Washington city with 5,000+ people has a higher share of college graduates.
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 Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 98.5% | 91.3% | 89.5% | 84.9% |
| 2010–14 | 98.3% | 91.6% | 90.0% | 86.1% |
| 2015–19 | 97.4% | 92.5% | 91.0% | 87.7% |
| 2020–24 | 97.6% | 93.1% | 91.9% | 89.3% |
| Change | −0.9 pts | +1.8 pts | +2.4 pts | +4.3 pts |
Finishing high school is nearly universal in Sammamish: 97.6% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma is down 0.9 points from 2006–10, even as the national rate rose. Only 20 of the 219 Washington cities with 5,000+ people have a higher share of high school graduates.
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 Sammamish
| Period | Sammamish | Seattle area | Washington | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.1% | 6.9% | 7.6% | 8.1% |
| 2010–14 | 4.4% | 8.3% | 8.9% | 9.4% |
| 2015–19 | 2.6% | 4.5% | 5.1% | 5.6% |
| 2020–24 | 2.9% | 5.0% | 5.1% | 5.4% |
| Change | −1.2 pts | −2.0 pts | −2.5 pts | −2.7 pts |
The job market in Sammamish has been strong: just 2.9% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment has edged down 1.2 points since 2006–10, in line with the national trend. 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).
Sammamish 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Sammamish | 3.01 | 41.2 | 4.4% | 15.0% | 4.0% | 1995 | $3,033 | 78.6% | 97.6% | 2.9% |
| Klahanie | 2.95 | 40.3 | 9.3% | 28.9% | 4.3% | 1992 | $2,948 | 71.3% | 97.7% | 3.6% |
| Issaquah | 2.51 | 40.5 | 6.7% | 37.2% | 5.3% | 1997 | $2,722 | 70.6% | 97.8% | 3.9% |
| Union Hill-Novelty Hill | 2.90 | 44.9 | 3.2% | 17.1% | 5.0% | 1999 | $2,764 | 72.1% | 97.8% | 6.1% |
| Bellevue | 2.52 | 39.7 | 6.1% | 48.4% | 6.7% | 1982 | $2,794 | 72.0% | 95.5% | 4.2% |
| Redmond | 2.45 | 36.8 | 5.3% | 54.8% | 7.2% | 1993 | $2,642 | 76.0% | 97.6% | 5.0% |
| Preston | 2.13 | 51.1 | 7.9% | 2.7% | 2.1% | 1990 | $3,292 | 71.3% | 99.4% | 0.5% |
| Carnation | 2.95 | 41.7 | 4.6% | 9.1% | 4.2% | 1990 | $2,300 | 51.3% | 95.9% | 1.6% |
| Fall City | 2.72 | 44.5 | 3.6% | 8.8% | 6.8% | 1988 | $2,764 | 66.3% | 98.0% | 2.9% |
| Beaux Arts Village | 3.16 | 38.4 | 5.0% | 1.5% | 1.1% | 1988 | $3,501 | 93.4% | 100.0% | 6.9% |
| Newcastle | 2.46 | 38.2 | 5.1% | 38.2% | 6.6% | 2001 | $2,677 | 67.7% | 97.8% | 5.4% |
All figures 2020–24.
Cities with similar populations: St. Clair Shores, MI · Lansdale, PA · Massillon, OH · Medford, MA · Midwest City, OK · Mount Prospect, IL · Westminster, MD · Waxahachie, TX · Twin Falls, ID · Mason, OH
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 Sammamish. 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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