Seattle, WA Profile: Facts & Data


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Seattle, Washington - Basic Facts

The City of Seattle is the largest city in Washington with a population of 710,295 as of July 1, 2018. Seattle ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Washington. See peer rankings below.

The primary coordinate point for Seattle is located at latitude 47.6205 and longitude -122.3509 in King County. The formal boundaries for the City of Seattle (see map below) encompass a land area of 83.84 sq. miles and a water area of 58.82 sq. miles. King County is in the Pacific time zone (GMT -8). The elevation is 177 feet.

The City of Seattle (GNIS ID: 2411856) 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 Seattle is located within Seattle Division of King County.

Jump to... (On This Page!)
  1. Seattle 2018 Demographic Data
  2. Growth Rates for Seattle (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Washington Research Tools (Easy Tools & Current Data)
  3. Washington Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Seattle, WA Data & Demographics (As of July 1, 2018)


Total Population 710,295
Population in Households 681,846
Population in Familes 404,998
Population in Group Qrtrs 28,449
Population Density2 8,472
Diversity Index3 61


Median Household Income $76,714
Average Household Income $111,204
Per Capita Income $52,686


Total Housing Units 354,494 (100%)
Owner Occupied HU 147,314 (41.6%)
Renter Occupied HU 184,165 (52.0%)
Vacant Housing Units 23,015 ( 6.5%)
Median Home Value $554,389
Average Home Value $657,061


Total Households 331,479
Average Household Size 2.06
Family Households 139,457
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood 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.


2010-2018 2018-2023
Population 1.89% 1.82%
Households 1.91% 1.9%
Families 1.67% 1.74%
Median Household Income   2.94%
Per Capita Income   2.72%

Seattle, WA - Peer Comparisons by Rank and Percentile

The table below compares Seattle to the other 627 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2018 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 # 1 100th
Population Density # 1 100th
Diversity Index # 111 82nd
Median Household Income # 170 73rd
Per Capita Income # 45 93rd

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

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Washington Census Data Comparison Tool

Compare Washington July 1, 2018 Data
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