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 2026 population of 12,739. It is also the county seat of Cowlitz County. Kelso is currently growing at a rate of 0.01% annually and its population has increased by 0.05% since the most recent census, which recorded a population of 12,732 in 2020.

The median household income in Kelso is $66,751 with a poverty rate of 12.04%. The median age in Kelso is 39.9 years: 37.5 years for males, and 40.9 years for females. For every 100 females there are 100.4 males.

12.7K
Total Population
1,566
Density (mi²)
1 0.01%
Growth

Kelso Population

Kelso Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202612,73910.01%
202512,73810.01%
202412,737880.7%
202312,649-16-0.13%
202212,665-57-0.45%
202112,72260.05%
202012,7323392.74%
201912,3931170.95%
201812,2761501.24%
201712,1261551.29%
201611,9711551.31%
201511,816920.78%
201411,724-6-0.05%
201311,730-46-0.39%
201211,776-95-0.8%
201111,871-31-0.26%
201011,902-23-0.19%
200011,895750.63%
199011,8206916.21%
198011,1298338.09%
197010,2961,91722.88%
19608,3791,03414.08%
19507,3455968.83%
19406,7494897.81%
19306,26000%

Median Age

Overall: 39.9 years
Female: 40.9 years
Male: 37.5 years

Kelso Adults

There are 10,186 adults, (2,194 of whom are seniors) in Kelso.

Sex Ratio

Female: 6,328 (49.9%)
Male: 6,356 (50.1%)

Demographics

The racial composition of Kelso includes 80.57% White, and smaller percentages for Black or African American, other race, Native Hawaiian or Pacific Islander, Asian, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White10,21980.57%
Two or more races1,61512.73%
Black or African American2461.94%
Other race2421.91%
Native Hawaiian or Pacific Islander2211.74%
Asian890.7%
Native American520.41%
Race
Population ↓
Percentage (of total)
White6555.16%
Two or more races4223.33%
Other race2281.8%
Race
Population ↓
Percentage (of total)
White9,56475.4%
Two or more races1,1939.41%
Black or African American2461.94%
Native Hawaiian or Pacific Islander2211.74%
Asian890.7%
Native American520.41%
Other race140.11%

Kelso Marital Status

Economics and Income Statistics

Kelso 's average per capita income is $50,380. Household income levels show a median of $66,751. The poverty rate stands at 12.04%.

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$89,155-
Families$75,656$90,179
Households$66,751$80,176
Non Families$54,435$57,749

$50,380

Average Income

$66,751

Median Household Income

12.04%

Poverty Rate

Nearby Cities

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)