Introduction to Mercer Island, Washington

Mercer Island, Washington, in King county, is 2 miles S of Bellevue, Washington (center to center) and 5 miles SE of Seattle, Washington. The city is part of the Seattle - Bellevue - Everett metropolitan statistical area (MSA). About 22,036 people live in Mercer Island.

Mercer Island History

The first settlements were established in this region in the 1870s. According to some sources, the place was named in honor of the pioneer, Judge Thomas Mercer. The first large settlement was called East Seattle. This was on the northwest side of Mercer Island. The Lake Washington Floating Bridge, which was built in 1940, played a significant role in the development of the region. The city of Mercer Island was officially incorporated on July 5, 1960. The nearby business district was incorporated as a town a month later. However, ten years later both municipalities merged on May 19, 1970.

Mercer Island and nearby Attractions

  • Eastside Heritage Center - McDowell House
  • Bellevue Arts Museum
  • Mercer Village
  • Cougar Mountain Zoo
  • Mercer Island Shopping Center
  • Island Crest Park

Things To Do In Mercer Island

Being in King county, Mercer Island provides easy access to a large number of historic sites and museums. One can take a trip to the Eastside Heritage Center-McDowell House and Winters House and the Klondike Gold Rush National Historical Park. The Bellevue Arts Museum, Frye Art Museum, Museum of Flight, Rosalie Whyel Museum of Doll Art, Vintage Telephone Equipment Museum, and Wing Luke Asian Museum can all be reached easily from Mercer Island. The city has great shopping malls that offer a host of entertainment opportunities. Other popular tourist haunts include Cougar Mountain Zoo, Pike Place Market, Seattle Aquarium, and Space Needle.

Mercer Island Transportation

International flights are available from Boeing Field/King County International Airport.

Mercer Island Higher Education

Residents of Mercer Island can enroll at City University, Renton Technical College, or Seattle University.


Total Population 23,636
Male Share of the Population 49.4%
Female Share of the Population 50.6%
Senior Citizens 20.3%
Employed Population 16+ 10,360
Age of the Population 46


% of people married 67.2%
Average household size 2

Education and Earnings

Population % with Bachelor Degree or Higher 75.6%
Median Earnings25+ $79,641
Median Earnings Without High School Qualification $16,176
Median Earnings With High School Degree $45,500


Median Family Income $155,729
% Above Poverty Level 95.7%
% Below Poverty Level 4.3%

Commute & Sprawl

Average Commute Time 22 minutes
% Working from Home 9.7%
% Walking and Biking to Work 2.6%
% Using Public Transportation 7.1%


People Living Alone 24.7%
Median Gross Rent $1,633
Median House Value $871,600


Other(often includes Hispanic and African American) 29.7%
US/American 0.7%
English 12.5%
Irish 12.7%

Mercer Island Almanac

Category Value
Nearest Medium City 2 miles S of Bellevue, Washington (center to center)
Nearest Large City 5 miles SE of Seattle, Washington
County King
Standard Zip Codes 98040
Phone Area Codes 206
Time Zone Pacific (-8 hours from GMT)
Daylight Savings The city observes Daylight Saving Time.
Latitude 47.57
Longitude -122.22

Mercer Island Climate

Nearest Weather Stations


  • Temp ranges are avg daily min and max for the month
  • Precipitation is rainfall (and rainfall equiv of snowfall)

Distance 6.6 miles
Jan Temp 36 to 47 F
Apr Temp 43 to 59 F
Jul Temp 56 to 75 F
Oct Temp 46 to 60 F
Annual Precip 38.2 inches
Distance 7.9 miles
Jan Temp 35 to 46 F
Apr Temp 42 to 58 F
Jul Temp 55 to 75 F
Oct Temp 46 to 60 F
Annual Precip 35.9 inches
Distance 8.5 miles
Jan Temp 36 to 46 F
Apr Temp 42 to 58 F
Jul Temp 55 to 75 F
Oct Temp 46 to 60 F
Annual Precip 37 inches

Nearby Cities and Towns

Location Population Median Family Income
Beaux Arts Village 425 $171,250
Bellevue 132,268 $106,002
Clyde Hill 3,097 $224,886
Hunts Point 487 $167,500
Medina 3,080 $208,214
Newcastle 10,792 $137,700
These schools offer particularly quick info upon request, and we have written detailed profiles for each (click school names to see the profiles). Request info from multiple schools, by clicking the Request Info links.
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Mercer Island High Schools

(Sorted by Number of Students)

9100 SE 42ND
Serves 1,395 students.
Student/teacher ratio: 21.5

A Non-traditional School
Serves 1 students.

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Info for Mercer Island Government Officials

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