Cowlitz County WA Information


Cowlitz County Subdivisions

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


Total Population 107,655
Population in Households 106,395
Population in Familes 85,649
Population in Group Qrtrs 1,260
Population Density1 94
Diversity Index2 37


Median Household Income $53,421
Average Household Income $69,580
Per Capita Income $27,358


Total Housing Units 45,028 (100%)
Owner Occupied HU 30,050 (66.7%)
Renter Occupied HU 11,848 (26.3%)
Vacant Housing Units 3,130 ( 7.0%)
Median Home Value $232,659
Average Home Value $292,617


Total Households 41,898
Average Household Size 2.54
Family Households 28,221
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. 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 0.61% 0.79%
Households 0.49% 0.72%
Families 0.43% 0.68%
Median Household Income   2.61%
Per Capita Income   3.15%


Cowlitz County WA - Peer Comparisons by Rank and Percentile

The table below compares Cowlitz 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 # 12 72nd
Population Density # 11 74th
Diversity Index # 26 36th
Median Household Income # 20 51st
Per Capita Income # 24 41st

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