King County, Washington Population 2020

King County, Washington's estimated population is 2,291,030 with a growth rate of 1.28% in the past year according to the most recent United States census data. King County, Washington is the largest county in Washington.

Year Population Growth Growth Rate
20202,291,03028,9301.28%
20192,262,10028,9401.30%
20182,233,16028,9301.31%
20172,204,23037,6301.74%
20162,166,60040,0401.88%
20152,126,56040,8301.96%
20142,085,73038,1901.87%
20132,047,54036,2201.80%
20122,011,32037,2401.89%
20111,974,08035,7001.84%
20101,938,380431,06028.60%
19901,507,320237,57018.71%
19801,269,750113,1209.78%
19701,156,630221,61623.70%
1960935,014202,02227.56%
1950732,992228,01245.15%
1940504,98041,4638.95%
1930463,51774,24419.07%
1920389,273104,63536.76%
1910284,638174,585158.64%
1900110,05346,06471.99%
189063,98957,079826.03%
18806,9104,790225.94%
18702,1201,818601.99%
18603020.00%
2020 Growth Rate
1.28%
County Website
Founded
December 22, 1852
County Seat

King County, Washington Population Growth

Population by Race

Race Population Percentage
White1,404,97364.95%
Asian370,90817.15%
Black or African American136,0546.29%
Two or More Races135,8436.28%
Some Other Race84,9563.93%
Native Hawaiian and Other Pacific Islander16,7790.78%
American Indian and Alaska Native13,7430.64%

King County, Washington Population Pyramid 2020

King County, Washington Median Age

37.1


Total

36.3


Male

37.8


Female

King County, Washington Adults

There are 1,717,880 adults, (274,609 of whom are seniors) in King County, Washington.

King County, Washington Age Dependency

49.9

Age Dependency Ratio

19

Old Age Dependency Ratio

30.9

Child Dependency Ratio

King County, Washington Sex Ratio

Female

1,080,320

49.94%

Male

1,082,940

50.06%

King County, Washington Households and Families

King County, Washington Renter vs Owner Occupied by Household Type

King County, Washington Household Types

Type Owner Renter
Married75.4%24.6%
All57.1%42.9%
Male47.5%52.5%
Female46.7%53.3%
Non Family38.3%61.7%

57.1%

Rate of Home Ownership

Type Count Average Size Owned
All865,6272.4657.1
Married413,8583.1575.4
Non Family344,4441.3938.3
Female73,2103.246.7
Male34,1153.2447.5

3.07

Average Family Size

2.46

Average Household Size

6.7%

Unmarried (Opposite Sex)

0.6%

Unmarried (Same Sex)

King County, Washington Education

Education Attained Count Percentage
Less Than 9th Grade51,0813.32%
9th to 12th Grade56,9973.71%
High School Graduate234,13615.23%
Some College279,31018.17%
Associates Degree125,1428.14%
Bachelors Degree476,44830.99%
Graduate Degree314,36120.45%

King County, Washington Educational Attainment by Race

Name Total High School Bachelors
White998,992968,086552,522
Asian268,046238,754158,302
Hispanic114,32481,90129,882
Black86,58376,01923,301
Multiple Races60,63256,75026,952
Other Race47,81928,7517,393
Islander10,0258,9081,355
Native American9,0947,4401,503

The highest rate of high school graduation is among white people with a rate of 96.91%.

The highest rate of bachelors degrees is among asian people with a rate of 59.06%.

Name Average Male Female
Overall$54,346$64,879$44,222
Less Than High School$26,760$31,376$21,200
High School Grad$35,070$40,145$29,711
Some College$41,759$50,445$35,827
Bachelors Degree$68,189$84,764$53,796
Graduate Degree$88,541$111,712$69,079

$54,346

Average Earnings

$64,879

Average Male

$44,222

Average Female

King County, Washington Language

King County, Washington Language by Age

King County, Washington Language

72.82% of King County, Washington residents speak only English, while 27.18% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 11.64% of the population.

King County, Washington Poverty

King County, Washington Poverty by Race

Name Total In Poverty Poverty Rate
White1,291,43085,0816.59%
Asian366,15234,8049.51%
Black133,76433,29424.89%
Hispanic203,90531,87915.63%
Multiple132,67616,18912.20%
Other83,91614,59917.40%
Islander16,4493,30220.07%
Native13,1323,00722.90%

9.55%

Overall Poverty Rate

8.82%

Male Poverty Rate

10.27%

Female Poverty Rate

Poverty in King County, Washington

The race most likely to be in poverty in King County, Washington is Black, with 24.89% below the poverty level.

The race least likely to be in poverty in King County, Washington is White, with 6.59% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.24%. Among those working part-time, it was 13.89%, and for those that did not work, the poverty rate was 18.68%.

Name Poverty
Less Than High School22.77%
High School12.01%
Some College9.06%
Bachelors or Greater3.80%
Name Poverty
Female Unemployed27.10%
Male Unemployed25.91%
Female Employed5.43%
Male Employed3.89%

King County, Washington Income

King County, Washington Income by Household Type

Name Median Mean
Households$89,418$120,828
Families$111,478$145,255
Married Families$128,434$163,602
Non Families$58,169$79,620

King County, Washington Marital Status

King County, Washington Marital Status

Marriage Rates

50.3%

Overall Marriage Rate

51.1%

Male Marriage Rate

49.5%

Female Marriage Rate

King County, Washington Married by Age and Sex

King County, Washington Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

King County, Washington Marital Status by Race

King County, Washington Veterans

104,243

Number of Veterans

94,665

Male Veterans

9,578

Female Veterans

War Veterans
Vietnam36,651
First Gulf War20,065
Second Gulf War18,001
Korea8,561
World War II5,122
Age Group Veterans
65 to 7426,127
35 to 5425,490
75+23,621
55 to 6419,597
18 to 349,408
Name Veterans % of Total
White83,8257.24%
Black7,9157.97%
Asian5,7371.89%
Hispanic4,6173.37%
2 or More3,6894.87%
Other1,3382.30%
Indian9278.88%
Hawaiian8126.89%

$King County, Washington Veterans by Education

6.54%

Veteran Poverty Rate

25.56%

Veteran Disability Rate

King County, Washington Employment Status

69.9%

Labor Force Participation

66.6%

Employment Rate

4.5%

Unemployment Rate

King County, Washington Place of Birth

Origin of Non-Citizens

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

39.97%

Born in Washington

77.50%

Native Born

22.50%

Foreign Born

11.77%

Non Citizen

Place of Birth

77.50% of King County, Washington residents were born in the United States, with 39.97% having been born in Washington. 11.77% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990