Cowlitz County WA Information


Cowlitz County Subdivisions

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  1. Cowlitz County 2019 Demographic Data
  2. Growth Rates forCowlitz County (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 - 2019 Demographics

Cowlitz County WA Data & Demographics (As of July 1, 2019)


Total Population 108,512
Population in Households 107,272
Population in Familes 85,757
Population in Group Qrtrs 1,240
Population Density 95
Diversity Index1 38


Median Household Income $51,218
Average Household Income $68,142
Per Capita Income $26,574
Wealth Index3 77


Total Housing Units 45,703 (100%)
Owner Occupied HU 29,551 (64.7%)
Renter Occupied HU 12,734 (27.9%)
Vacant Housing Units 3,418 ( 7.5%)
Median Home Value $248,707
Housing Affordability Index2 97


Total Households 42,285
Average Household Size 2.54
Family Households 28,474
Average Family Size 3
  1. 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.
  2. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  3. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2019 2019-2024
Population 0.63% 0.67%
Households 0.54% 0.62%
Families 0.48% 0.58%
Median Household Income   3.14%
Per Capita Income   3.18%


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, 2019 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 # 23 44th
Per Capita Income # 23 44th

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, 2019 Data
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