Mercer Island, WA Profile: Facts, Map & Data

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Mercer Island, Washington - Basic Facts

The City of Mercer Island had a population of 24,304 as of July 1, 2016. Mercer Island ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Washington. See peer rankings below.

The primary coordinate point for Mercer Island is located at latitude 47.5627 and longitude -122.2257 in King County. The formal boundaries for the City of Mercer Island (see map below) encompass a land area of 6.32 sq. miles and a water area of 0 sq. miles. King County is in the Pacific time zone (GMT -8). The elevation is 335 feet.

The City of Mercer Island (GNIS ID: 2411082) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Washington is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Mercer Island is located within Seattle East Division of King County.

Beneath the boundary map are tables with Mercer Island population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.


Neighborhood Data

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City of Mercer Island, WA Boundary Map



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Mercer Island, WA Data & Demographics (As of July 1, 2016)

POPULATION

Total Population 24,304
Population in Households 24,304
Population in Familes 20,749
Population in Group Qrtrs 0
Population Density1 3,846
Diversity Index2 45
 

HOUSEHOLDS

Total Households 9,678
Average Household Size 2.51
Family Households 6,917
Average Family Size 3

HOUSING

Total Housing Units 10,542 (100%)
Owner Occupied HU 6,859 (65.1%)
Renter Occupied HU 2,819 (26.7%)
Vacant Housing Units 864 ( 8.2%)
Median Home Value $983,611
Average Home Value $986,201
 

INCOME

Median Household Income $129,198
Average Household Income $193,749
Per Capita Income $77,152
  (Compound Annual Growth Rates)

GROWTH RATES

2010-2015 2015-2020
Population 1.1% 1.32%
Households 0.97% 1.25%
Families 0.92% 1.22%
Median Household Income   1.7%
Per Capita Income   1.43%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Mercer Island, WA - Peer Comparisons by Rank and Percentile

The table below compares Mercer Island to the other 627 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2016 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 46 93rd
Population Density1 # 43 93rd
Diversity Index2 # 220 65th
Median Household Income # 10 99th
Per Capita Income # 5 99th

Additional comparisons and rankings can be made with a VERY EASY TO USE Washington Census Data Comparison Tool.