Mercer Island, WA Population

Overview

25,506

Total Population

45.5

Median age

52.92%

Female population %

89:100

Gender ratio (M:F)

45-49 years

Largest age group

64.0

Total dependency ratio

White

Largest racial group

825

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Mercer Island's population is old compared to the rest of the country:

The median age in Mercer Island is 45.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Mercer Island's population under 18 was 23.54%, compared to the 22.51% nationwide.
Mercer Island's elderly or the senior population (over 65 age) was 19.78% as compared to 16.04% nationwide.
Of the total population in Mercer Island, 19.24% were under the age of 15, 14.35% aged 15 to 29, 46.63% aged 30 to 64, 15.94% aged 65 to 84, and 3.83% were 85 years of age and older.

There are 1,488 more females than males in Mercer Island:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 52.92% females and 47.08% males in Mercer Island, WA.
The Mercer Island, WA gender ratio is 89:100 i.e. 89 men to 100 women (0.890).
For male population, the largest age group is 10-14 years with a population of 1,094.
For the female population, the largest age group is 45-49 years with a population of 1,233.

Mercer Island's population has become increasingly diverse:

Racial distribution of Mercer Island population: 68.29% are White, 0.91% are Black or African American, 0.07% are American Indian and Alaska Native, 21.53% are Asian, 0.11% are Native Hawaiian and other Pacific Islander, 1.47% are some other race and 7.63% are multiracial.
Mercer Island's racial breakdown clearly shows that there is an absolute majority of White population in the city.
By ethnicity, 825 is Hispanic or Latino (of any race), and 24,681 (96.77% of the total population) is Non-Hispanic.
The largest racial group in Mercer Island is White with a population of 17,418 (68.29% of the total population).

Mercer Island's population has already reached its peak and is showing a trend of decline:

The peak population was 25,906 in the year 2018
From 2000 to 2010, Mercer Island's population increased by 701 (3.18%), as compared to the national growth of 9.63%.
From 2010 to 2020, Mercer Island's population increased by 2,974 (13.06%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Mercer Island's population was lowest in year 2000 at 22,069.