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Data on this report is based on areas within the legal city boundary, outlined in black on the map. Any additional neighborhoods shown on the map are associated with the city by name and are included for reference only.

Mercer Island, WA
Real Estate & Demographic Data






Mercer Island profile


Living in Mercer Island



Mercer Island is a medium-sized city located in the state of Washington. With a population of 25,172 people and six associated neighborhoods, Mercer Island is the 45th largest community in Washington.

Mercer Island home prices are not only among the most expensive in Washington, but Mercer Island real estate also consistently ranks among the most expensive in America.

Also of interest is that Mercer Island has more people living here who work in computers and math than 95% of the places in the US.

Of important note, Mercer Island is also a city of artists. Mercer Island has more artists, designers and people working in media than 90% of the communities in America. This concentration of artists helps shape Mercer Island’s character.

Telecommuters are a relatively large percentage of the workforce: 30.33% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

Although the majority of commuting trips in the city are by private automobile, Mercer Island is somewhat unusual for a city of its size for having a substantial number of people who use public transportation. For a lot of people, the bus helps to get to and from their jobs every morning, which benefits everyone in the Mercer Island area by reducing both traffic and air pollution.

Do you have a 4-year college degree or graduate degree? If so, you may feel right at home in Mercer Island. 77.74% of adults here have a 4-year degree or graduate degree, whereas the national average for all cities and towns is just 21.84%.

The per capita income in Mercer Island in 2022 was $113,575, which is wealthy relative to Washington and the nation. This equates to an annual income of $454,300 for a family of four.

Mercer Island is an extremely ethnically-diverse city. The people who call Mercer Island home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Mercer Island residents report their race to be White, followed by Asian. Important ancestries of people in Mercer Island include English, German, Irish, Italian, and Norwegian.

In addition, Mercer Island has a lot of people living here who were born outside of the US (24.57%).

The most common language spoken in Mercer Island is English. Other important languages spoken here include Chinese and Spanish.