Kelso Flag

Kelso

County:
Cowlitz County
County Seat:
Yes
Area (mi²):
8.135
State:
Washington

Kelso is a city located in Cowlitz County, Washington. Kelso has a 2025 population of 12,592. It is also the county seat of .Kelso is currently declining at a rate of -0.22% annually and its population has decreased by -1.09% since the most recent census, which recorded a population of 12,731 in 2020.

The average household income in Kelso is $68,924 with a poverty rate of 19.46%. The median age in Kelso is 38.4 years: 35 years for males, and 40.8 years for females.

12.6K
Total Population
1,548
Density (mi²)
-28 -0.22%
Growth

Kelso Population

Kelso Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Kelso includes 86.35% White, and smaller percentages for Black or African American, other race, Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Other race

Asian

Native Hawaiian or Pacific Islander

Native American

Race
Population
Percentage (of total)
White10,96486.35%
Two or more races1,2379.74%
Black or African American2081.64%
Other race1361.07%
Asian1040.82%
Native Hawaiian or Pacific Islander320.25%
Native American160.13%

Kelso Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Kelso's average per capita income is $36,777. Household income levels show a median of $59,462. The poverty rate stands at 19.46%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$77,484-
Families$65,765$76,576
Households$59,462$68,924
Non Families$40,169$50,370

$36,777

Average Income

$59,462

Median Household Income

19.46%

Poverty Rate

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)