City · Washington
Sammamish, Washington
Sammamish, city, in King County, Washington. Sammamish had 66,110 residents on July 1, 2025 by the Census Bureau's estimate, down 2.0% since 2020; the 2020 Census counted 67,455 and the ACS 2020-2024 5-year estimates put it at 66,463 (±44). GEOID 5361115.
Residents, July 2025 estimate
66,110
Census Bureau estimate (no margin published)
2020 Census count: 67,455 · ACS 2020-2024: 66,463 ±44
Median household income
$239,690
±$15,260 (90% margin)
Washington: $98,141
Median home value
$1,407,300
±$43,544 (90% margin)
Washington: $564,600
Median gross rent
$2,857
±$168 (90% margin)
Washington: $1,760
Where is Sammamish and what county is it in?
Sammamish is a city in King County, Washington. It covers 20.4 square miles of land, 3,302 residents per square mile in 2020.
Sammamish is in the Seattle-Tacoma-Bellevue, WA metropolitan statistical area, which takes in 3 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Sammamish, and is it growing?
The Census Bureau estimates that 66,110 people lived in Sammamish on July 1, 2025, down 2.0% since 2020, while Washington grew 3.8%. The 2020 Census counted 67,455 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 66,463 (±44).
| Measure | Sammamish | King County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 66,463 ±44 | 2,287,171 | +1,789 |
| Households | 22,144 ±430 | 941,054 | +629 |
| Average household size | 3.00 ±0.06 | 2.39 | no clear change |
| Housing units | 22,610 ±426 | 1,003,284 | no clear change |
Sammamish's population since 2000
From 34,104 in 2000 to 66,110 in 2025: up 93.8%. The 2000, 2010 and 2020 figures are census counts, each for Sammamish as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Sammamish?
The median resident of Sammamish is 39.9 years old; 28.6% are under 18 and 9.1% are 65 or older. The largest group is non-Hispanic white residents at 49.2%, then non-Hispanic Asian residents at 37.1%. 36.5% of residents were born outside the United States.
| Measure | Sammamish | King County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 39.9 ±0.6 | 37.4 | +1.2 |
| Under 18 years | 28.6% ±1.0 pts | 19.5% | – |
| 65 years and over | 9.1% ±0.7 pts | 14.0% | – |
| Male | 49.0% ±1.1 pts | 50.7% | – |
| Hispanic or Latino (any race) | 5.6% ±1.2 pts | 11.0% | +1.7 pts |
| White alone, not Hispanic | 49.2% ±2.2 pts | 52.9% | −9.8 pts |
| Black or African American alone, not Hispanic | 1.3% ±0.6 pts | 6.4% | no clear change |
| Asian alone, not Hispanic | 37.1% ±2.1 pts | 20.5% | +5.4 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.3% ±0.3 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.1% ±0.1 pts | 0.7% | – |
| Two or more races, not Hispanic | 5.9% ±0.9 pts | 7.3% | – |
| Some other race alone, not Hispanic | 0.4% ±0.2 pts | 0.6% | – |
| Born outside the United States | 36.5% ±2.2 pts | 25.8% | +6.4 pts |
| Speak a language other than English at home (age 5+) | 39.2% ±2.5 pts | 31.1% | – |
| Civilian veterans (age 18+) | 2.2% ±0.4 pts | 4.5% | – |
| With a disability | 4.8% ±0.8 pts | 10.3% | – |
| No health insurance coverage | 2.3% ±1.0 pts | 5.2% | no clear change |
| High school graduate or higher (age 25+) | 97.5% ±0.7 pts | 93.8% | – |
| Bachelor's degree or higher (age 25+) | 77.1% ±2.2 pts | 56.7% | no clear change |
| Graduate or professional degree (age 25+) | 37.3% ±1.8 pts | 24.2% | – |
| Lived in the same house a year earlier | 90.6% ±1.3 pts | 83.3% | – |
| Moved from another state in the past year | 2.0% ±0.8 pts | 3.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Sammamish earn?
Half of Sammamish's 22,144 households earn less than $239,690 a year (±$15,260), against $124,746 in King County and $98,141 in Washington. In 2015-2019 the median was $214,144 in 2024 dollars, so it rose by $25,546 after inflation. 4.3% of residents live below the poverty line.
| Measure | Sammamish | King County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $239,690 ±$15,260 | $124,746 | +$25,546 |
| Mean household income | $293,336 ±$12,459 | $176,799 | – |
| Per capita income | $98,874 ±$4,431 | $74,100 | +$12,261 |
| People below the poverty line | 4.3% ±1.2 pts | 8.6% | +1.9 pts |
| Children under 18 below the poverty line | 4.9% ±2.1 pts | 9.7% | no clear change |
| Households receiving SNAP | 2.3% ±1.5 pts | 8.2% | – |
| Households with a computer | 99.9% ±0.2 pts | 98.1% | – |
| Households with a broadband subscription | 99.1% ±0.5 pts | 95.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Sammamish?
Owners occupy 82.6% of Sammamish's occupied homes and renters 17.4%. The median owner-occupied home is valued at $1,407,300 by its owner (±$43,544). The median renter pays $2,857 a month including utilities, and 34.2% of renters pay 35% or more of their income on rent.
| Measure | Sammamish | King County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,407,300 ±$43,544 | $859,900 | +$385,824 |
| Median gross rent | $2,857 ±$168 | $2,092 | no clear change |
| Renters paying 35% or more of income on rent | 34.2% ±7.9 pts | 37.5% | +15.2 pts |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,273 | – |
| Owner-occupied homes | 82.6% ±2.2 pts | 55.4% | −3.1 pts |
| Renter-occupied homes | 17.4% ±2.2 pts | 44.6% | – |
| Housing units | 22,610 ±426 | 1,003,284 | no clear change |
| Homeowner vacancy rate | 0.0% ±0.2 pts | 0.7% | – |
| Rental vacancy rate | 2.1% ±2.3 pts | 5.3% | – |
| Single-family detached homes | 81.4% ±2.0 pts | 50.0% | – |
| Mobile homes | 0.5% ±0.4 pts | 1.4% | – |
| Built 2020 or later | 0.6% ±0.3 pts | 2.1% | – |
| Built 2010 to 2019 | 12.1% ±1.4 pts | 14.2% | – |
| Built 1939 or earlier | 0.5% ±0.3 pts | 10.9% | – |
| Households with no vehicle | 1.6% ±0.7 pts | 11.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Sammamish building?
Builders took permits for 45 new housing units in Sammamish in 2025 (45 in single-family houses), 0.7 per 1,000 residents against 4.4 across Washington.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Sammamish work and get to work?
50.5% of Sammamish's workers drive alone and 38.8% work from home. The average trip to work takes 29.3 minutes. The unemployment rate in 2020-2024 averaged 3.1%.
| Measure | Sammamish | King County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 68.8% ±1.2 pts | 69.9% | – |
| Unemployment rate | 3.1% ±0.5 pts | 4.8% | no clear change |
| Drove alone to work | 50.5% ±2.4 pts | 50.4% | – |
| Carpooled | 4.7% ±0.8 pts | 7.0% | – |
| Public transportation | 2.6% ±0.7 pts | 6.8% | – |
| Walked | 1.5% ±0.7 pts | 4.3% | – |
| Worked from home | 38.8% ±2.1 pts | 29.2% | +29.1 pts |
| Mean travel time to work | 29.3 min ±1.3 | 27.6 min | −4.3 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Sammamish?
14 census tracts lie mostly in Sammamish, and 2 more reach into it (2020 census blocks). Their median household incomes run from $144,265 (Tract 322.22) to $250,000 or more (Tract 322.15).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 323.17King County | 6,859 | $236,031 |
| Tract 323.18King County | 6,767 | $250,000 or more |
| Tract 322.16King County | 5,255 | $249,456 |
| Tract 322.11King County | 5,227 | $191,667 |
| Tract 323.16King County | 5,546 | $250,000 or more |
| Tract 322.13King County | 4,775 | $250,000 or more |
| Tract 322.18King County | 6,050 | $170,956 |
| Tract 322.23King County | 4,353 | $222,847 |
| Tract 322.22King County | 4,250 | $144,265 |
| Tract 322.17King County | 4,032 | $248,125 |
| Tract 322.07King County | 3,723 | $220,430 |
| Tract 322.25King County | 3,824 | $184,625 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Sammamish) · Census block assignment files
How does Sammamish compare with other places in Washington?
By the Census Bureau's July 2025 estimates, Sammamish is the 599th-most populous of the 19,476 U.S. incorporated places that have one and the 20th-most populous of 281 in Washington.
Sammamish ranks 5th of 387 places in Washington with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 20th | 281 |
| Growth 2020-2025 (PEP) | 188th | 203 |
| Residents per square mile | 70th | 394 |
| Median household income | 5th | 387 |
| Per capita income | 9th | 393 |
| Median home value | 6th | 384 |
| Median gross rent | 12th | 351 |
| Poverty rate | 255th | 281 |
| Bachelor's degree or higher | 5th | 382 |
| Median age | 189th | 394 |
| Owner-occupied share | 126th | 388 |
| Work from home | 12th | 307 |
| Travel time to work | 146th | 394 |
Sammamish's figures with every place in Washington (CSV)
Every place in Washington, sortable · Compare Sammamish with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Sammamish?
5 of the 57 figures for Sammamish on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Sammamish are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Sammamish.