Mercer Island, Washington Population 2022

26,358
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Mercer Island is a city located in King County Washington. With a 2020 population of 26,358, it is the 50th largest city in Washington and the 1745th largest city in the United States. Mercer Island is currently growing at a rate of 1.17% annually and its population has increased by 2.08% since the most recent census, which recorded a population of 25,820 in 2020. Spanning over 13 miles, Mercer Island has a population density of 4,130 people per square mile.

The average household income in Mercer Island is $224,619 with a poverty rate of 5.30%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Mercer Island is 46 years, 45.2 years for males, and 46.4 years for females.

Mercer Island Demographics

According to the most recent ACS, the racial composition of Mercer Islandwas:

  • White: 71.45%
  • Asian: 19.83%
  • Two or more races: 5.96%
  • Other race: 1.70%
  • Black or African American: 0.91%
  • Native Hawaiian or Pacific Islander: 0.08%
  • Native American: 0.07%
The current population of Mercer Island, Washington is 26,358 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 25,820.

Mercer Island, Washington Population 2022

Population by Race

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Mercer Island Population by Race

Mercer Island Population Pyramid 2022

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Mercer Island Median Age

45.9


Total

45.1


Male

46.5


Female

Mercer Island Adults

There are 19,739 adults, (5,317 of whom are seniors) in Mercer Island.

Mercer Island Age Dependency

Age Dependency Ratio

36.9

Old Age Dependency Ratio

42.2

Child Dependency Ratio

Mercer Island Sex Ratio

Female

13,546

52.46%

Male

12,274

47.54%

Mercer Island Population by Age

Mercer Island Renter vs Owner Occupied by Household Type

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Mercer Island Household Types

66.9%

Rate of Home Ownership

Mercer Island Households and Families

3.03

Average Family Size

2.54

Average Household Size

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Mercer Island Households by Type

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Mercer Island Educational Attainment by Sex (over 25)

Mercer Island Educational Attainment by Race

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

The highest rate of bachelors degrees is among native american people with a rate of 94.12%.

Mercer Island Educational Attainment by Race

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$96,025

Average Earnings

$119,864

Average Male

$65,430

Average Female

Mercer Island Earnings by Educational Attainment

Mercer Island Language by Age

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Mercer Island Language

77.86% of Mercer Island residents speak only English, while 22.14% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 12.07% of the population.

Mercer Island Language

Mercer Island Poverty by Race

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5.30%

Overall Poverty Rate

4.14%

Male Poverty Rate

6.35%

Female Poverty Rate

Poverty in Mercer Island

The race most likely to be in poverty in Mercer Island is Islander, with 100.00% below the poverty level.

The race least likely to be in poverty in Mercer Island is Multiple, with 5.98% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.79%. Among those working part-time, it was 6.20%, and for those that did not work, the poverty rate was 7.51%.

Mercer Island Poverty

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Mercer Island Poverty Rate by Education

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Mercer Island Poverty Rate by Employment Status and Sex

Mercer Island Income by Household Type

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Income by Household Type

Mercer Island Marital Status

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Marriage Rates

63.9%

Overall Marriage Rate

67.1%

Male Marriage Rate

61.0%

Female Marriage Rate

Mercer Island Married by Age and Sex

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Mercer Island 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.

Mercer Island Marital Status by Race

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Mercer Island Marital Status

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1,161

Number of Veterans

Male Veterans

Female Veterans

Mercer Island Veterans by War

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Mercer Island Veterans by Age

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Mercer Island Veterans by Race

Mercer Island Veterans by Education

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3.57%

Veteran Poverty Rate

43.44%

Veteran Disability Rate

Mercer Island Veterans by Education

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62.6%

Labor Force Participation

61.2%

Employment Rate

2.2%

Unemployment Rate

Mercer Island Employment by Age

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Mercer Island Employment by Race

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Mercer Island 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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33.32%

Born in Mercer Island

77.75%

Native Born

22.25%

Foreign Born

8.85%

Non Citizen

13.41%

Naturalized

Place of Birth

77.75% of Mercer Island residents were born in the United States, with 33.32% having been born in Washington. 8.85% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Mercer Island Place of Birth

Note: 2021 and 2022 data is projected

Mercer Island Population by Year