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.
According to the most recent ACS, the racial composition of Mercer Islandwas:
Rate of Home Ownership
Average Family Size
Average Household Size
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%.
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.
Overall Poverty Rate
Male Poverty Rate
Female Poverty Rate
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%.
Overall Marriage Rate
Male Marriage Rate
Female Marriage Rate
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.
Number of Veterans
Veteran Poverty Rate
Veteran Disability Rate
Labor Force Participation
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Born in Mercer Island
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.