Mercer Island is a city located in King County Washington. Mercer Island has a 2024 population of 24,407. Mercer Island is currently declining at a rate of -1.35% annually and its population has decreased by -5.2% since the most recent census, which recorded a population of 25,747 in 2020.
The average household income in Mercer Island is $303,425 with a poverty rate of 4.64%. The median age in Mercer Island is 45.8 years: 45.5 years for males, and 46.1 years for females.
According to the most recent ACS, the racial composition of Mercer Island was:
Race | Population | Percentage (of total) |
|---|---|---|
| White | 16,609 | 65.69% |
| Asian | 5,649 | 22.34% |
| Two or more races | 2,442 | 9.66% |
| Black or African American | 363 | 1.44% |
| Other race | 199 | 0.79% |
| Native American | 20 | 0.08% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
White
Asian
Two or more races
Black or African American
Other race
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 9,893 | 2.54 | 66 | 34 |
| Married | 6,266 | 3.13 | 81.3 | 18.7 |
| Non Family | 2,868 | 1.21 | 38 | 62 |
| Female | 600 | 2.72 | 43.3 | 56.7 |
| Male | 159 | 2.74 | 54.1 | 45.9 |
3.04
Average Family Size
2.54
Average Household Size
66.0%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Education Attained | Count | Percentage |
|---|---|---|
| 9th to 12th Grade | 75 | 0.41% |
| Associates Degree | 1,017 | 5.59% |
| Bachelors Degree | 6,957 | 38.27% |
| Graduate Degree | 7,369 | 40.54% |
| High School Graduate | 970 | 5.34% |
| Less Than 9th Grade | 264 | 1.45% |
| Some College | 1,527 | 8.4% |
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 12,766 | 12,731 | 10,157 |
| Asian | 4,041 | 3,883 | 3,217 |
| 2+ Races | 958 | 843 | 681 |
| Hispanic | 426 | 291 | 228 |
| Black | 210 | 179 | 116 |
| Other Race | 110 | 110 | 102 |
| Native American | 20 | 20 | 7 |
The highest rate of high school graduation is among native american people with a rate of 100%.
The highest rate of bachelors degrees is among other race people with a rate of 92.73%.
All
Male
Female
Name | Average | Male | Female |
|---|---|---|---|
| Bachelors Degree | $94,154 | $125,000 | $76,222 |
| Graduate Degree | $183,778 | $226,875 | $132,727 |
| High School Graduate | $35,114 | $43,831 | $22,292 |
| Less Than 9th Grade | $0 | $0 | $0 |
| Overall | $118,061 | $154,984 | $81,961 |
| Some College | $56,440 | $74,531 | $43,690 |
$118,061
Average Earnings
$154,984
Average Male
$81,961
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
75.79% of Mercer Island residents speak only English, while 24.21% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 13.63% of the population.
rate
Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 16,428 | 442 | 2.69% |
| Asian | 5,643 | 296 | 5.25% |
| Multiple | 2,437 | 208 | 8.54% |
| Black | 323 | 132 | 40.87% |
| Hispanic | 588 | 104 | 17.69% |
| Other | 199 | 45 | 22.61% |
4.64%
Overall Poverty Rate
2.93%
Male Poverty Rate
6.12%
Female Poverty Rate
The race most likely to be in poverty in Mercer Island is Black, with 40.87% below the poverty level.
The race least likely to be in poverty in Mercer Island is White, with 2.69% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.38%. Among those working part-time, it was 3.96%, and for those that did not work, the poverty rate was 7.77%.
rate
Rate | Poverty |
|---|---|
| Less Than 9th Grade | 29.13% |
| High School | 11.11% |
| Some College | 6.83% |
| Bachelors or Greater | 2.83% |
rate
Rate | Poverty |
|---|---|
| Female Unemployed | 24.38% |
| Male Unemployed | 4.9% |
| Female Employed | 2.5% |
| Male Employed | 1.9% |
Households
Families
MarriedFamilies
NonFamilies
Name | Median | Mean |
|---|---|---|
| Families | $250,001 | $371,886 |
| Households | $202,359 | $303,425 |
| Married Families | $250,001 | $-999,999,999 |
| Non Families | $81,951 | $129,110 |
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
64.0%
Overall Marriage Rate
68.6%
Male Marriage Rate
60.0%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
900
Number of Veterans
849
Male Veterans
51
Female Veterans
War | Veterans |
|---|---|
| Vietnam | 425 |
| First Gulf War | 198 |
| Second Gulf War | 75 |
| Korea | 66 |
| World War II | 40 |
count
Age Group | Veterans |
|---|---|
| 75+ | 461 |
| 65 to 74 | 171 |
| 35 to 54 | 157 |
| 55 to 64 | 100 |
| 18 to 34 | 11 |
count
Name | Veterans | % of Total |
|---|---|---|
| White | 680 | 4.95% |
| 2+ Races | 102 | 8.93% |
| Asian | 74 | 1.66% |
| Black | 44 | 19.82% |
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
0%
Veteran Poverty Rate
30.17%
Veteran Disability Rate
LaborForceParticipation
60.1%
Labor Force Participation
58.7%
Employment Rate
2.5%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
34.61%
Born in Mercer Island
75.5%
Native Born
24.5%
Foreign Born
10.07%
Non Citizen
14.43%
Naturalized
75.5% of Mercer Island residents were born in the United States, with 34.61% having been born in Washington. 10.07% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.
Year | Population | Growth | Change |
|---|---|---|---|
| 2029 | 22,732 | -335 | -1.45% |
| 2028 | 23,067 | -335 | -1.43% |
| 2027 | 23,402 | -335 | -1.41% |
| 2026 | 23,737 | -335 | -1.39% |
| 2025 | 24,072 | -335 | -1.37% |
| 2024 | 24,407 | -335 | -1.35% |
| 2023 | 24,742 | -284 | -1.13% |
| 2022 | 25,026 | -319 | -1.26% |
| 2021 | 25,345 | -402 | -1.56% |
| 2020 | 25,747 | -130 | -0.5% |
| 2019 | 25,877 | -29 | -0.11% |
| 2018 | 25,906 | 150 | 0.58% |
| 2017 | 25,756 | 133 | 0.52% |
| 2016 | 25,623 | 240 | 0.95% |
| 2015 | 25,383 | 627 | 2.53% |
| 2014 | 24,756 | 311 | 1.27% |
| 2013 | 24,445 | 384 | 1.6% |
| 2012 | 24,061 | 516 | 2.19% |
| 2011 | 23,545 | 775 | 3.4% |
| 2010 | 22,770 | 0 | 0% |
| 2000 | 22,036 | 1,220 | 5.86% |
| 1990 | 20,816 | -706 | -3.28% |
| 1980 | 21,522 | 2,475 | 12.99% |
| 1970 | 19,047 | 7,047 | 58.73% |
| 1960 | 12,000 | -10,732 | -47.21% |