King County, WA Population

Overview

2.24 million

Total Population

37.1

Median age

49.47%

Female population %

102.1:100

Gender ratio (M:F)

30-34 years

Largest age group

43.0

Total dependency ratio

White

Largest racial group

224,407

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

King County's population is young compared to the rest of the country:

The median age in King County is 37.1, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
King County's population under 18 was 20.19%, compared to the 22.51% nationwide.
King County's elderly or the senior population (over 65 age) was 13.14% as compared to 16.04% nationwide.
Of the total population in King County, 16.94% were under the age of 15, 20.16% aged 15 to 29, 49.76% aged 30 to 64, 11.44% aged 65 to 84, and 1.70% were 85 years of age and older.

There are 23,572 less females than males in King County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.47% females and 50.53% males in King County, WA.
The King County, WA gender ratio is 102.1:100 i.e. 102.1 men to 100 women (1.021).
For male population, the largest age group is 30-34 years with a population of 108,502.
For the female population, the largest age group is 30-34 years with a population of 98,719.

King County's population has become increasingly diverse:

Racial distribution of King County population: 60.52% are White, 6.45% are Black or African American, 0.61% are American Indian and Alaska Native, 18.76% are Asian, 0.73% are Native Hawaiian and other Pacific Islander, 4.39% are some other race and 8.53% are multiracial.
King County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 224,407 is Hispanic or Latino (of any race), and 2.02 million (89.99% of the total population) is Non-Hispanic.
The largest racial group in King County is White with a population of 1.36 million (60.52% of the total population).

King County's population has already reached its peak and is showing a trend of decline:

The peak population was 2,274,094 in the year 2020
From 2000 to 2010, King County's population increased by 199,008 (11.44%), as compared to the national growth of 9.63%.
From 2010 to 2020, King County's population increased by 335,663 (17.32%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, King County's population was lowest in year 2000 at 1,739,423.