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Sammamish, WA
Key Indicators
A quick look at key numbers
Population
66,463
Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates
Median Age
39.9
years ∙ half population younger than 39.9, half older
Diversity Index
61.3%
chance two random people differ in race and ethnicity
Nativity
36.5%
foreign-born population
Geographic Context
Location, size, and surroundings
About
Sammamish is a city within King County, Washington, United States.
Co-ordinates
DEC47.594268° N, 122.038081° W
DMS47° 35′ 39.36″ N, 122° 02′ 17.09″ W
Population Density & area
3,258/sq mi
(1,256/km²)
Demographics & Living
Who lives here, how households are formed, and community composition
Population Composition
Key characteristics of the population
Sex Distribution
49%
male
Male
49%
Female
51%
males per 100 females
Sammamish
96
King County
102.8
Washington
101.4
Nativity
36.5%
foreign-born population
% Foreign-born
Sammamish
36.5%
King County
25.8%
Washington
15.4%
Age Distribution
How the population is spread across age groups
Median Age
39.9
years ∙ half population younger than 39.9, half older
Dependency ratio
60.6
dependents per 100 working-age adults
Sammamish
60.6
King County
50.4
Washington
61.3
AGE DISTRIBUTION
Distribution of age group
Median age
| Sammamish | King County | Washington | |
|---|---|---|---|
| Age Group | |||
| Children (Under 18) | 28.6% | 19.5% | 21.4% |
| Working age (18-64) | 62.3% | 66.5% | 62% |
| Senior (65+) | 9.1% | 14% | 16.6% |
| Dependency ratio | |||
| Total dependency ratio | 60.6 | 50.4 | 61.3 |
| Child dependency ratio | 46 | 29.3 | 34.5 |
| Old-age dependency ratio | 14.6 | 21.1 | 26.8 |
Racial & Ethnic Composition
Racial and ethnic makeup and how it compares
Race & Ethnicity
Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.
Diversity Index
61.3%
chance two random people differ in race and ethnicity
Sammamish
61.3%
King County
65.7%
Washington
56.5%
Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.
RACIAL & ETHNIC COMPOSITION
Race & Ethnicity
Percentage of Sammamish population
| Sammamish | King County | Washington | |
|---|---|---|---|
| Hispanic or Latino | 5.6% | 11% | 14.4% |
| Mexican | 2% | 7.1% | 10.8% |
| Puerto Rican | 0.3% | 0.4% | 0.5% |
| Cuban | 0.2% | 0.2% | 0.2% |
| Other Hispanic / Latino | 3.2% | 3.3% | 2.8% |
| Not Hispanic or Latino | 94.4% | 89% | 85.6% |
| One race | 88.5% | 81.7% | 78.8% |
| White | 49.2% | 52.9% | 63.1% |
| Black or African American | 1.3% | 6.4% | 3.8% |
| American Indian and Alaska Native | 0.3% | 0.4% | 0.8% |
| Asian | 37.1% | 20.5% | 9.7% |
| Native Hawaiian and Other Pacific Islander | 0.1% | 0.7% | 0.7% |
| Some Other Race | 0.4% | 0.6% | 0.6% |
| Two or more races (Multiracial) | 5.9% | 7.3% | 6.8% |
Household & Families Composition
Household size, type, and family structure
Household structure
86.7%
family
Family
86.7%
Non family
13.3%
% family households
Sammamish
86.7%
King County
57.5%
Washington
63.4%
Average household size
3
persons per household
Household & Family COMPOSITION
Households
Percentage of Sammamish population
| Sammamish | King County | Washington | |
|---|---|---|---|
| Total households | 22,144 | 941,054 | 3,064,820 |
| Average houshold size | 3 | 2.39 | 2.5 |
| Family households | 19,196 | 541,377 | 1,942,412 |
| Average family size | 3.23 | 3.06 | 3.07 |
| Married couple family | 17,461 | 436,956 | 1,506,003 |
| Other families | 1,735 | 104,421 | 436,409 |
| Male householder | 388 | 35,565 | 145,719 |
| Female householder | 1,347 | 68,856 | 290,690 |
| Non-family households | 2,948 | 399,677 | 1,122,408 |
| One-person households | 2,129 | 297,911 | 848,664 |
| Male householder | 919 | 148,519 | 404,881 |
| Senior (65+) living alone | 214 | 29,505 | 115,764 |
| Female householder | 1,210 | 149,392 | 443,783 |
| Senior (65+) living alone | 497 | 55,655 | 213,754 |
| Other living arrangements | 819 | 101,766 | 273,744 |
Housing Profile
Housing stock, ownership, rentals, and cost burdens
Total housing units
22,610
housing units
Sammamish
22,610
King County
1,003,284
Washington
3,306,620
Occupancy status
97.9%
occupied
Occupied
97.9%
Vacant
2.1%
vacancy rate
Sammamish
2.1%
King County
6.2%
Washington
7.3%
Housing Characteristics
How the housing supply is structured and used
Types of Housing unit
85.5%
Single family houses
Median Year Built
1994
Half of houses were built before 1994, and half after.
Note: Median year built reflects occupied units only; distribution includes all units.
Housing Characteristics
Units, rooms & bedrooms
Physical characteristics of housing units
| Sammamish | King County | Washington | |
|---|---|---|---|
| Rooms per unit | |||
| Median rooms | 7.2 | 5 | 5.5 |
| 1–3 rooms | 5.3% | 28.5% | 18.6% |
| 4–6 rooms | 35.9% | 40.2% | 47.6% |
| 7+ rooms | 58.8% | 31.3% | 33.8% |
| Bedrooms | |||
| No bedroom / studio | 0.8% | 8.2% | 4.5% |
| 1 bedroom | 2.5% | 17.6% | 11.8% |
| 2 bedrooms | 10.5% | 24% | 24.3% |
| 3 bedrooms | 32.2% | 26.1% | 36.2% |
| 4+ bedrooms | 54% | 24.1% | 23.2% |
| At a glance | |||
| Median year built | 1994 | 1983 | 1986 |
| Total housing units | 22,610 | 1,003,284 | 3,306,620 |
Occupancy Profile
Who is inside and how they use it
Homeownership
82.6%
owners
Renter-occupied
17.4%
Owner-occupied
82.6%
homeownership rate
Sammamish
82.6%
King County
55.4%
Washington
63.8%
Average household size
3.07
Owner-occupied
2.67
Renter-occupied
owner-occupied average size
Sammamish
3.07
King County
2.65
Washington
2.65
Housing Characteristics
Occupied unit characteristics
Tenure, crowding, and utilities
| Sammamish | King County | Washington | |
|---|---|---|---|
| Total occupied units | 22,144 | 941,054 | 3,064,820 |
| Year moved in | |||
| 2020 or later | 19.5% | 31.9% | 27.6% |
| 2010 to 2019 | 46% | 40.2% | 41.8% |
| 2000 to 2009 | 21.2% | 14.1% | 15.4% |
| 1999 or earlier | 13.3% | 13.8% | 15% |
| Occupants per room | |||
| 1.00 or fewer | 98.6% | 96.1% | 96.5% |
| 1.01 to 1.50 | 1.1% | 1.9% | 2.2% |
| 1.51 or more | 0.2% | 1.9% | 1.4% |
| Vehicles availability | |||
| No vehicles | 1.6% | 11.2% | 7.1% |
| 1 vehicle | 20.5% | 37% | 30.5% |
| 2 vehicles | 53% | 33.8% | 36.3% |
| 3 or more vehicles | 25% | 17.9% | 26.1% |
| House heating fuel used | |||
| Gas | 73.5% | 41.3% | 36% |
| Electricity | 25.9% | 54.5% | 58.6% |
| Solar | 0% | 0.2% | 0.2% |
| Fuel oil, kerosene etc | 0.3% | 2.2% | 1.3% |
| All other fuels | 0.2% | 1% | 3.2% |
| No fuel used | 0% | 0.9% | 0.6% |
| Selected characteristics | |||
| Lacking complete plumbing | 0.1% | 0.3% | 0.4% |
| Lacking complete kitchen | 0.3% | 1.2% | 1% |
| No telephone service available | 0.1% | 0.6% | 0.8% |
Housing Value
What owner-occupied units are worth
Median home value
$1,407,300
owner-occupied units
Housing Cost Burden
21%
of homeowners with a mortgage are cost-burdened
Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.
Financial characteristics
Property value and housing costs
Tenure, crowding, and utilities
| Sammamish | King County | Washington | |
|---|---|---|---|
| Property value | |||
| Median Value | $1,407,300 | $859,900 | $564,600 |
| Under $100,000 | 0.6% | 2.5% | 4.7% |
| $100,000 - $200,000 | 1.2% | 1.4% | 3.8% |
| $200,000 - $300,000 | 0.1% | 1.9% | 7% |
| $300,000 - $500,000 | 2.7% | 11.6% | 27.8% |
| $500,000 - $1,000,000 | 17.5% | 44.8% | 40.8% |
| $1,000,000 and more | 77.8% | 37.9% | 15.9% |
| Owner-occupied households | |||
| With a mortgage | 75.4% | 69.5% | 66.1% |
| Without a mortgage | 24.6% | 30.5% | 33.9% |
| Median monthly owner costs | |||
| With a mortgage | $4,001 | $3,273 | $2,445 |
| Without a mortgage | $1,477 | $1,116 | $773 |
| Gross rent | |||
| Median rent | $2,857 | $2,092 | $1,760 |
Education Profile
How educated is the community and how education pays off
Adults with a college degree
77.1%
of adults 25+ with a bachelor's degree or higher
Sammamish
77.1%
King County
56.7%
Washington
39.6%
Adults without a high school diploma
2.5%
of adults (25+) without a high school diploma
Sammamish
2.5%
King County
6.2%
Washington
7.7%
School Enrollment
Who is enrolled in school and at what level
School enrollment
20,013
population (age 3+) enrolled in school
College-going rate (18-24 yr olds)
34.6%
of 18-24-year-olds in college or graduate school
Enrollment & school type
Enrollment levels, college-going rate, and public vs private school split
Population 3+ currently enrolled in a school
| Sammamish | King County | Washington | |
|---|---|---|---|
| Total enrolled (age 3+) | 20,013 | 506,039 | 1,763,756 |
| Nursery / preschool | 6.9% | 6.5% | 5.9% |
| K–12 | 79.4% | 63.6% | 69.1% |
| Kindergarten | 4.5% | 5% | 5.1% |
| Elementary: Grades 1–4 | 20.8% | 19.1% | 20.9% |
| Elementary: Grades 5–8 | 26.7% | 19.7% | 21.4% |
| High School: Grades 9–12 | 27.4% | 19.9% | 21.6% |
| College or graduate school | 13.7% | 29.9% | 25.1% |
| College, undergraduate | 10% | 21.2% | 19.6% |
| Graduate, professional school | 3.7% | 8.7% | 5.5% |
| College-going rate · 18-24 yr olds | 34.6% | 41.7% | 33.2% |
| School type | |||
| Public school | 83% | 79.6% | 83% |
| Private school | 17% | 20.4% | 17% |
Education Attainment by Level & Gender
What is the highest level of education completed among adults
Education attainment
43,412
population 25 years and over
Attainment by gender
Male vs Female
Adults (25+) · Share within each education level
Educational Attainment Overview
Distribution and key education attainment rates for adults (25+)
Highest credential completed · adults 25+
| Sammamish | King County | Washington | |
|---|---|---|---|
| Population (25+) | 43,412 | 1,657,996 | 5,484,391 |
| Less than 9th grade | 0.9% | 3.3% | 3.4% |
| 9th–12th, no diploma | 1.6% | 2.9% | 4.3% |
| High school diploma or GED | 5.3% | 14.1% | 21.6% |
| Some college, no degree | 9.8% | 15.3% | 21% |
| Associate's degree | 5.3% | 7.6% | 10% |
| Bachelor's degree or higher | 77.1% | 56.7% | 39.6% |
| Bachelor's degree | 39.7% | 32.6% | 24% |
| Graduate or professional | 37.3% | 24.2% | 15.6% |
| High School or higher | 97.5% | 93.8% | 92.3% |
Earnings by education level
percentage as applicable
Median Earnings
$137,394
Median earnings for adults 25+, by level
Poverty Rate
2.6%
for ages 25+, with bachelors degree or higher
Outcomes by Education Level
Earnings and poverty rates across education levels (25+)
Adults 25+
| Sammamish | King County | Washington | |
|---|---|---|---|
| Median earnings | |||
| Population 25+, with earnings | $137,394 | $79,039 | $62,378 |
| Less than high school graduate | $49,792 | $40,052 | $37,363 |
| High school graduate (includes equivalency) | $61,418 | $46,915 | $46,550 |
| Some college or associate's degree | $74,745 | $57,939 | $53,700 |
| Bachelor's degree | $140,503 | $95,539 | $81,898 |
| Graduate or professional degree | $177,159 | $128,010 | $108,295 |
| Poverty rates | |||
| Less than high school graduate | 24.2% | 21.3% | 20.8% |
| High school graduate (includes equivalency) | 5.1% | 13.2% | 12.2% |
| Some college or associate's degree | 7.9% | 9.1% | 8.9% |
| Bachelor's degree or higher | 2.6% | 3.9% | 4.2% |
About Neilsberg Research
Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.
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