Census tract · King County
Census Tract 323.18, King County, Washington
Census Tract 323.18, GEOID 53033032318, in King County, Washington, mostly within Sammamish (89% of its census blocks). 6,767 residents in the ACS 2020-2024 5-year estimates (±780); the 2020 Census counted 6,903.
Residents, 2020-2024
6,767
±780 (90% margin)
2020 Census count: 6,903
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
King County: $124,746
Median home value
$1,348,000
±$121,120 (90% margin)
King County: $859,900
Median gross rent
$3,329
±$282 (90% margin)
King County: $2,092
Where is Census Tract 323.18?
Census Tract 323.18 is one of 495 census tracts in King County, Washington. It covers 2.83 square miles of land, 2,440 residents per square mile in 2020. Its GEOID, 53033032318, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Sammamish | 89% |
6 census tracts border Census Tract 323.18: Tract 322.15 ($250,000 or more), Tract 322.25 ($184,625), Tract 323.15 ($235,139), Tract 323.16 ($250,000 or more), Tract 323.17 ($236,031) and Tract 323.28 ($232,179). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 323.18?
The 2020-2024 American Community Survey puts Census Tract 323.18's population at 6,767 (±780) in 2,158 households; the 2020 Census counted 6,903 residents and 2,248 housing units.
| Measure | Tract 323.18 | Sammamish |
|---|---|---|
| Total population | 6,767 ±780 | 66,463 |
| Households | 2,158 ±186 | 22,144 |
| Average household size | 3.13 ±0.20 | 3.00 |
| Housing units | 2,224 ±170 | 22,610 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 323.18?
The median resident of Census Tract 323.18 is 38.5 years old; 31.6% are under 18 and 7.2% are 65 or older. The largest group is non-Hispanic white residents at 44.9%, then non-Hispanic Asian residents at 42.6%. 40.1% of residents were born outside the United States.
| Measure | Tract 323.18 | Sammamish |
|---|---|---|
| Median age | 38.5 ±1.1 | 39.9 |
| Under 18 years | 31.6% ±3.3 pts | 28.6% |
| 65 years and over | 7.2% ±1.2 pts | 9.1% |
| Hispanic or Latino (any race) | 7.7% ±5.1 pts | 5.6% |
| White alone, not Hispanic | 44.9% ±6.2 pts | 49.2% |
| Black or African American alone, not Hispanic | 0.0% ±0.6 pts | 1.3% |
| Asian alone, not Hispanic | 42.6% ±6.8 pts | 37.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.8% ±1.2 pts | 0.3% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.6 pts | 0.1% |
| Two or more races, not Hispanic | 4.1% ±2.5 pts | 5.9% |
| Some other race alone, not Hispanic | 0.0% ±0.6 pts | 0.4% |
| Born outside the United States | 40.1% ±4.2 pts | 36.5% |
| Speak a language other than English at home (age 5+) | 45.9% ±6.1 pts | 39.2% |
| Civilian veterans (age 18+) | 1.3% ±1.3 pts | 2.2% |
| With a disability | 2.9% ±1.6 pts | 4.8% |
| No health insurance coverage | 1.9% ±1.5 pts | 2.3% |
| High school graduate or higher (age 25+) | 98.2% ±1.6 pts | 97.5% |
| Bachelor's degree or higher (age 25+) | 82.2% ±5.0 pts | 77.1% |
| Graduate or professional degree (age 25+) | 43.6% ±6.4 pts | 37.3% |
| Lived in the same house a year earlier | 92.8% ±3.7 pts | 90.6% |
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 Census Tract 323.18 earn?
Half of the 2,158 households in Census Tract 323.18 earn less than $250,000 or more a year (), against $124,746 across King County: 1st highest of the county's 491 tracts with a reliable estimate.
| Measure | Tract 323.18 | Sammamish |
|---|---|---|
| Median household income | $250,000 or more | $239,690 |
| Mean household income | $298,971 ±$33,411 | $293,336 |
| Per capita income | $95,907 ±$13,498 | $98,874 |
| People below the poverty line | 3.1% ±2.9 pts | 4.3% |
| Children under 18 below the poverty line | 2.7% ±3.4 pts | 4.9% |
| Households receiving SNAP | 0.0% ±1.8 pts | 2.3% |
| Households with a computer | 99.3% ±1.1 pts | 99.9% |
| Households with a broadband subscription | 100.0% ±1.8 pts | 99.1% |
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 Census Tract 323.18?
Owners occupy 88.8% of Census Tract 323.18's occupied homes and renters 11.2%. The median owner-occupied home is valued at $1,348,000 by its owner (±$121,120). The median renter pays $3,329 a month including utilities.
| Measure | Tract 323.18 | Sammamish |
|---|---|---|
| Median home value (owner-occupied) | $1,348,000 ±$121,120 | $1,407,300 |
| Median gross rent | $3,329 ±$282 | $2,857 |
| Renters paying 35% or more of income on rent | 30.5% ±24.4 pts | 34.2% |
| Median monthly owner costs, with a mortgage | $3,622 ±$460 | $4,000 or more |
| Owner-occupied homes | 88.8% ±4.8 pts | 82.6% |
| Renter-occupied homes | 11.2% ±4.8 pts | 17.4% |
| Housing units | 2,224 ±170 | 22,610 |
| Single-family detached homes | 90.6% ±4.7 pts | 81.4% |
| Mobile homes | 0.0% ±1.8 pts | 0.5% |
| Built 2020 or later | 0.8% ±1.2 pts | 0.6% |
| Built 2010 to 2019 | 19.3% ±4.9 pts | 12.1% |
| Built 1939 or earlier | 0.0% ±1.8 pts | 0.5% |
| Households with no vehicle | 1.0% ±1.6 pts | 1.6% |
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 do people in Census Tract 323.18 get to work?
54.0% of Census Tract 323.18's workers drive alone and 36.0% work from home. The average trip to work takes 27.1 minutes.
| Measure | Tract 323.18 | Sammamish |
|---|---|---|
| In the labor force (age 16+) | 70.9% ±4.8 pts | 68.8% |
| Unemployment rate | 2.3% ±1.7 pts | 3.1% |
| Drove alone to work | 54.0% ±7.9 pts | 50.5% |
| Carpooled | 4.1% ±2.5 pts | 4.7% |
| Public transportation | 2.5% ±2.8 pts | 2.6% |
| Walked | 1.5% ±1.4 pts | 1.5% |
| Worked from home | 36.0% ±8.7 pts | 38.8% |
| Mean travel time to work | 27.1 min ±2.5 | 29.3 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
How does Census Tract 323.18 compare with the other tracts in King County?
Among King County's tracts with a reliable estimate, Census Tract 323.18 ranks as shown below (1 = highest).
| Measure | In King County | In Sammamish |
|---|---|---|
| Population | 29th of 494 | 2nd of 14 |
| Residents per square mile | 414th of 494 | 11th of 14 |
| Median household income | 1st of 491 | 1st of 14 |
| Per capita income | 122nd of 494 | 9th of 14 |
| Median home value | 57th of 481 | 7th of 14 |
| Median gross rent | 28th of 483 | 6th of 14 |
| Bachelor's degree or higher | 49th of 494 | 6th of 14 |
| Median age | 244th of 494 | 10th of 14 |
| Owner-occupied share | 53rd of 483 | 5th of 14 |
The tracts next to it on King County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 41.01 | 1st | $250,000 or more |
| Tract 62 | 1st | $250,000 or more |
| Tract 239.02 | 1st | $250,000 or more |
| Tract 241 | 1st | $250,000 or more |
| Tract 242 | 1st | $250,000 or more |
| Tract 243.02 | 1st | $250,000 or more |
| Tract 245 | 1st | $250,000 or more |
| Tract 246.01 | 1st | $250,000 or more |
| Tract 246.02 | 1st | $250,000 or more |
| Tract 249.04 | 1st | $250,000 or more |
| Tract 250.08 | 1st | $250,000 or more |
| Tract 322.13 | 1st | $250,000 or more |
| Tract 322.15 | 1st | $250,000 or more |
| Tract 322.21 | 1st | $250,000 or more |
| Tract 322.24 | 1st | $250,000 or more |
| Tract 323.16 | 1st | $250,000 or more |
| Tract 323.18 | 1st | $250,000 or more |
| Tract 323.20 | 1st | $250,000 or more |
| Tract 323.21 | 1st | $250,000 or more |
| Tract 326.03 | 1st | $250,000 or more |
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 323.18?
3 of the 18 figures for Census Tract 323.18 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.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). 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 · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections