Snohomish County WA Information


Snohomish County Subdivisions

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


Total Population 805,624
Population in Households 795,743
Population in Familes 644,887
Population in Group Qrtrs 9,881
Population Density2 386
Diversity Index3 54


Median Household Income $79,165
Average Household Income $98,905
Per Capita Income $37,134


Total Housing Units 315,000 (100%)
Owner Occupied HU 200,502 (63.7%)
Renter Occupied HU 98,694 (31.3%)
Vacant Housing Units 15,804 ( 5.0%)
Median Home Value $370,036
Average Home Value $435,374


Total Households 299,196
Average Household Size 2.66
Family Households 202,266
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 1.49% 1.48%
Households 1.33% 1.43%
Families 1.27% 1.4%
Median Household Income   2.53%
Per Capita Income   2.74%


Snohomish County WA - Peer Comparisons by Rank and Percentile

The table below compares Snohomish County to the other 39 counties and county equivalents 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 # 3 95th
Population Density # 7 85th
Diversity Index # 12 72nd
Median Household Income # 2 97th
Per Capita Income # 4 92nd

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