Cowlitz County WA Information


Cowlitz County Subdivisions

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


Total Population 105,460
Daytime Population: Workers 39,435
Daytime Population: Residents 64,130
Total Daytime Population (TDP) 103,565
Ratio TDP/Total Population1 0.98
Population in Households 104,253
Population in Familes 83,334
Population in Group Qrtrs 1,207
Population Density2 93
Diversity Index3 36


Median Household Income $51,590
Average Household Income $66,552
Per Capita Income $26,203


Total Housing Units 44,471 (100%)
Owner Occupied HU 26,600 (59.8%)
Renter Occupied HU 14,491 (32.6%)
Vacant Housing Units 3,380 ( 7.6%)
Median Home Value $213,700
Average Home Value $267,960


Total Households 41,091
Average Household Size 2.54
Family Households 27,703
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 0.41% 0.47%
Households 0.29% 0.4%
Families 0.23% 0.37%
Median Household Income   1.5%
Per Capita Income   2.53%


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, 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 # 12 72nd
Population Density # 12 72nd
Diversity Index # 27 33rd
Median Household Income # 19 54th
Per Capita Income # 22 46th

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