King County WA Information


King County Subdivisions

King County WA Data & Demographics (As of July 1, 2017)


Total Population 2,161,990
Daytime Population: Workers 1,293,838
Daytime Population: Residents 1,030,417
Total Daytime Population (TDP) 2,324,255
Ratio TDP/Total Population1 1.08
Population in Households 2,121,477
Population in Familes 1,566,907
Population in Group Qrtrs 40,513
Population Density2 1,022
Diversity Index3 63


Median Household Income $79,340
Average Household Income $110,668
Per Capita Income $45,259


Total Housing Units 927,386 (100%)
Owner Occupied HU 504,534 (54.4%)
Renter Occupied HU 370,905 (40.0%)
Vacant Housing Units 51,947 ( 5.6%)
Median Home Value $445,238
Average Home Value $527,265


Total Households 875,439
Average Household Size 2.42
Family Households 509,226
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population 1.57% 1.41%
Households 1.44% 1.35%
Families 1.37% 1.31%
Median Household Income   2.39%
Per Capita Income   2.49%


King County WA - Peer Comparisons by Rank and Percentile

The table below compares King County to the other 39 counties and county equivalents in Washington by rank and percentile using July 1, 2017 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 # 8 82nd
Median Household Income # 1 100th
Per Capita Income # 1 100th

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