Sammamish, Washington Population 2021

66,686
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Sammamish is a city located in King County Washington. With a 2020 population of 66,686, it is the 19th largest city in Washington and the 570th largest city in the United States . Sammamish is currently growing at a rate of 0.60% annually and its population has increased by 45.67% since the most recent census, which recorded a population of 45,780 in 2010. Sammamish reached it's highest population of 66,686 in 2021. Spanning over 24 miles, Sammamish has a population density of 3,264 people per square mile.

The average household income in Sammamish is $210,573 with a poverty rate of 2.40%. The median rental costs in recent years comes to $2,395 per month, and the median house value is $830,000. The median age in Sammamish is 38.7 years, 39 years for males, and 38.3 years for females.

Sammamish Demographics

According to the most recent ACS, the racial composition of Sammamish was:

  • White: 62.03%
  • Asian: 31.73%
  • Two or more races: 4.25%
  • Black or African American: 1.26%
  • Other race: 0.45%
  • Native American: 0.17%
  • Native Hawaiian or Pacific Islander: 0.11%
The current population of Sammamish, Washington is 66,686 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 65,495.The last official US Census in 2010 recorded the population at 45,780.

Sammamish, Washington Population 2021

Population by Race

Race Population Percentage
White40,11762.03%
Asian20,52331.73%
Two or More Races2,7484.25%
Black or African American8181.26%
Some Other Race2880.45%
American Indian and Alaska Native1100.17%
Native Hawaiian and Other Pacific Islander700.11%
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Sammamish Population by Race

Sammamish Population Pyramid $2021

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Sammamish Median Age

38.7


Total

39


Male

38.3


Female

Sammamish Adults

There are 45,303 adults, (5,148 of whom are seniors) in Sammamish.

Sammamish Age Dependency

61.1

Age Dependency Ratio

12.8

Old Age Dependency Ratio

48.2

Child Dependency Ratio

Sammamish Sex Ratio

Female

32,823

50.75%

Male

31,851

49.25%

Sammamish Population by Age

Sammamish Renter vs Owner Occupied by Household Type

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Sammamish Household Types

Type Owner Renter
Married89.2%10.8%
All85.7%14.3%
Female76.5%23.5%
Non Family73.3%26.7%
Male63.9%36.1%

85.7%

Rate of Home Ownership

Sammamish Households and Families

Type Count Average Size Owned
All21,515385.7
Married16,9483.3289.2
Non Family2,7611.2573.3
Female1,1822.6176.5
Male6242.8263.9

3.23

Average Family Size

3

Average Household Size

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Sammamish Households by Type

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Education Attained Count Percentage
Less Than 9th Grade3460.82%
9th to 12th Grade7461.76%
High School Graduate2,5496.03%
Some College4,42810.47%
Associates Degree2,4405.77%
Bachelors Degree17,14140.52%
Graduate Degree14,65334.64%
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Sammamish Educational Attainment by Sex (over 25)

Sammamish Educational Attainment by Race

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Race Total High School Bachelors
White25,80925,46518,427
Asian13,57412,93911,514
Hispanic1,4081,342846
2+ Races899884671
Black536512261
Other Race212211162
Native American694424
Islander494935

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 84.82%.

Sammamish Educational Attainment by Race

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Name Average Male Female
Overall$106,726$141,755$65,278
Less Than 9th Grade$40,018$46,250$
High School Graduate$47,241$58,384$30,881
Some College$48,822$82,778$33,667
Bachelors Degree$106,779$137,874$72,685
Graduate Degree$142,907$161,317$85,224

$106,726

Average Earnings

$141,755

Average Male

$65,278

Average Female

Sammamish Earnings by Educational Attainment

Sammamish Language by Age

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Sammamish Language

65.76% of Sammamish residents speak only English, while 34.24% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 18.50% of the population.

Sammamish Language

Sammamish Poverty by Race

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Name Total In Poverty Poverty Rate
White38,1547121.87%
Asian20,4873751.83%
Black81826632.52%
Multiple2,7481696.15%
Hispanic2,5201194.72%
Native921718.48%
Other288103.47%

2.40%

Overall Poverty Rate

1.83%

Male Poverty Rate

2.95%

Female Poverty Rate

Poverty in Sammamish

The race most likely to be in poverty in Sammamish is Black, with 32.52% below the poverty level.

The race least likely to be in poverty in Sammamish is Asian, with 1.83% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.15%. Among those working part-time, it was 3.28%, and for those that did not work, the poverty rate was 4.79%.

Sammamish Poverty

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Name Poverty
Less Than 9th Grade7.05%
High School3.69%
Some College3.36%
Bachelors or Greater1.45%

Sammamish Poverty Rate by Education

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Rate Poverty
Male Unemployed4.90%
Female Unemployed3.91%
Female Employed1.79%
Male Employed0.60%

Sammamish Poverty Rate by Employment Status and Sex

Sammamish Income by Household Type

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Name Median Mean
Households$174,003$210,573
Families$188,083$222,195
Married Families$199,509-
Non Families$98,234$121,319
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Income by Household Type

Sammamish Marital Status

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Marriage Rates

72.4%

Overall Marriage Rate

72.8%

Male Marriage Rate

72.0%

Female Marriage Rate

Sammamish Married by Age and Sex

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Sammamish Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Sammamish Marital Status by Race

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Sammamish Marital Status

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1,712

Number of Veterans

1,542

Male Veterans

170

Female Veterans

War Veterans
Vietnam663
First Gulf War434
Second Gulf War269
Korea119
World War II63

Sammamish Veterans by War

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Age Group Veterans
65 to 74534
35 to 54507
75+351
55 to 64259
18 to 3461

Sammamish Veterans by Age

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Name Veterans % of Total
White1,5125.19%
2+ Races938.25%
Asian580.41%
Black285.22%
Hispanic191.21%
Islander1224.49%
Other Race94.25%

Sammamish Veterans by Race

Sammamish Veterans by Education

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1.17%

Veteran Poverty Rate

16.12%

Veteran Disability Rate

Sammamish Veterans by Education

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68.8%

Labor Force Participation

66.8%

Employment Rate

2.8%

Unemployment Rate

Sammamish Employment by Age

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Sammamish Employment by Race

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Sammamish Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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32.79%

Born in Sammamish

69.88%

Native Born

30.12%

Foreign Born

16.58%

Non Citizen

13.55%

Naturalized

Place of Birth

69.88% of Sammamish residents were born in the United States, with 32.79% having been born in Washington. 16.58% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Sammamish Place of Birth

Year Population Growth Annual Growth Rate
202166,6863970.60%
202066,2893970.60%
201965,8923970.61%
201865,4955660.87%
201764,9291,1121.74%
201663,8175510.87%
201563,2661,0921.76%
201462,1741,1681.91%
201361,0061,0331.72%
201259,9731,2472.12%
201158,7261,0701.86%
201057,65623,5525.39%
200034,1040.00%

Sammamish Population by Year