Washington Population 2020


Washington State is situated in the far northwestern corner of the United States, and with a land mass of 71,299 square miles, it is the 18th largest state in the US in terms of surface area.

The US Census Bureau 2015 estimate shows Washington's population has reached 7,170,351, up from 6.72 million recorded during the 2010 census. Washington is currently enjoying a healthy growth rate of 1.27%, which ranks 8th in the country.

In order to gauge any current population within Washington State, it is necessary to refer back to the last nationwide census which was carried out in 2010. At that stage, it was confirmed that there were 6,724,540 people in the state, and that represented an increase of just over 14% on the numbers declared in 2000.

Washington State Area and Population Density

Current estimates now show a population of 7.17 million in the state of Washington, and rapid growth is expected to continue. This population places Washington as the 13th most populous state in the country, but only 25th in terms of population density. Within its total area of 71,299 square miles, there is an average of 101.2 people for every square mile of Washington State territory.

Seattle is the largest city in the state with a population of 684,451, with a density of 7,962 people per square mile. The Seattle-Tacoma-Bellevue metropolitan area has a population of 3.73 million, however, and encompasses nearby cities like Kent, Tacoma, Bellevue and Everett. It accounts for more than half of the state's population. The most populated counties in Washington State are King and Pierce counties with respective populations of 2,188,649 and 876,764

Washington State Gender and Religion Statistics

The median age across the state of Washington is 37.6 years of age. In terms of the ratio of females to males, 50.1% of the population is female and 49.9% male.

In terms of preferred religions among the residents of the state, 61% of the population is affiliated with a Christian based faith, 6% are affiliated with non-Christian faiths, and 32% are not affiliated with any faith in particular.

Washington State Boundary, Census, and Statehood History

After a period when Great Britain also claimed it, Washington was definitively acquired in 1846 and was included in Oregon Territory, established in 1848. Washington became a separate territory in 1853, acquired essentially its present boundaries in 1863, and was admitted as a State on November 11, 1889.

The 1850 population is that of Clark and Lewis Counties, Oregon Territory; census coverage extended only to the southwestern part of present-day Washington. In 1860 census coverage included nearly the whole present State, and some persons in present-day northern Idaho and northwestern Montana.

Washington Demographics

According to the most recent ACS, the racial composition of Washington was:

  • White: 76.03%
  • Asian: 8.33%
  • Two or more races: 5.71%
  • Other race: 4.27%
  • Black or African American: 3.70%
  • Native American: 1.30%
  • Native Hawaiian or Pacific Islander: 0.66%

Washington State Population History

Like many areas in the far western United States, Washington State began life with a very small population and back in 1850, the population was recorded at 1,201. Ten years later, however, that had increased significantly by nearly 900% to 11,594 and it sparked a population explosion within the state to the extent that by the end of the 1800s, the population had grown to 518,103.

The Census of 1910 revealed that the Washington State population had exceeded one million for the very first time and the pattern throughout the 1900s was one of continued substantial growth.

Washington State Population Growth

Growth has continuously progressed through the present day where the population of Washington State in 2016 has surpassed 7 million. The overall picture in the state is clearly one of sustained growth and there is really nothing to indicate that this factor will change at all for the foreseeable future.

Population Projections for Washington State

Looking at percentage increases for the last few censuses, it is safe to assume that the population of Washington State will be well on its way to another major milestone through 2020, when the population is estimated to surpass 7.5 million.

According to current projections, Washington's population will reach 8.9 million by 2040, with migration contributing 59% of this increase, while the remaining 41% will be contributed by natural increases (or the number of births minus the number of deaths). While 14% of Washington's total population is now over the age of 65, this percentage will climb to 21% by 2040, which will have serious impacts on planning and policy-making for the state as a whole.

Washington has a fairly large Hispanic and Latino population of 12.4%, which may belong to any race. Despite a small overall percentage of the population, the black population of Washington is mostly in the Central District and South End regions of Seattle and Tacoma.

American Indians, meanwhile, live on Indian reservations and jurisdictory lands including Muckleshoot Indian Reservation and the Yakima Indian Reservation. Westernmost and Pacific coast regions of the state have large American Indian communities as well.

Asian American and Pacific Islanders are concentrated in the Seattle-Tacoma metropolitan area. Tacoma itself has one of the largest Cambodian American communities in the country, and Washington as a whole has the largest percentage of Pacific Islander people of any mainland US state except Utah.

Washington Growth Rate

Washington Population Rank

Washington Population 2020

King County

  • Population2,233,160
  • Density1055.60 per sq km
  • Growth Since 201015.21%
  • State Population Rank1
  • % of State29.63%

When comparing data from the 2010 Census to estimates taken in 2015 by the US Census Bureau, this comparison shows that the majority of Washington's counties saw increases in their populations. The highest gain of 12.23% was reported in Franklin County, followed by King County's 9.26%. Other counties that had population gains exceeding 5% include Whitman, Benton, Clark, and Snohomish, while other counties such as Whatcom, Pierce, and Douglas had smaller growth rates.

There were a total of five counties that had losses in their respective populations. The highest loss occurred in Columbia County, with a decrease of 3.95%. The remaining losses were recorded in Lincoln, Garfield, Pacific, and Grays Harbor.

Population by Race

Race Population Percentage
Two or More Races416,7955.71%
Some Other Race311,1704.27%
Black or African American269,8543.70%
American Indian and Alaska Native95,0481.30%
Native Hawaiian and Other Pacific Islander48,0430.66%

Washington Population Pyramid 2020

Washington Median Age







Washington Adults

There are 5,661,460 adults, (1,073,500 of whom are seniors) in Washington.

Washington Age Dependency


Age Dependency Ratio


Old Age Dependency Ratio


Child Dependency Ratio

Washington Sex Ratio







Washington Households and Families

Washington Renter vs Owner Occupied by Household Type

Washington Household Types

Type Owner Renter
Non Family46.6%53.4%


Rate of Home Ownership

Type Count Average Size Owned
Non Family987,1271.3446.6


Average Family Size


Average Household Size


Unmarried (Opposite Sex)


Unmarried (Same Sex)

Washington Education

Education Attained Count Percentage
Less Than 9th Grade187,1303.74%
9th to 12th Grade257,5915.15%
High School Graduate1,109,02022.17%
Some College1,183,50023.66%
Associates Degree501,44910.03%
Bachelors Degree1,104,62022.08%
Graduate Degree658,64013.17%

Washington Educational Attainment by Race

Name Total High School Bachelors
Multiple Races175,193160,51454,839
Other Race164,68293,90917,794
Native American59,13449,2808,015

The highest rate of high school graduation is among white people with a rate of 94.74%.

The highest rate of bachelors degrees is among asian people with a rate of 52.07%.

Name Average Male Female
Less Than High School$26,113$30,685$20,402
High School Grad$33,695$40,840$26,530
Some College$39,635$49,388$31,526
Bachelors Degree$60,065$74,556$47,374
Graduate Degree$76,915$96,912$63,303


Average Earnings


Average Male


Average Female

Washington Language

Washington Language by Age

Washington Language

80.61% of Washington residents speak only English, while 19.39% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.47% of the population.

Washington Poverty

Washington Poverty by Race

Name Total In Poverty Poverty Rate


Overall Poverty Rate


Male Poverty Rate


Female Poverty Rate

Poverty in Washington

The race most likely to be in poverty in Washington is Native, with 24.44% below the poverty level.

The race least likely to be in poverty in Washington is White, with 9.26% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.83%. Among those working part-time, it was 15.13%, and for those that did not work, the poverty rate was 18.91%.

Name Poverty
Less Than High School21.79%
High School12.19%
Some College9.44%
Bachelors or Greater4.21%
Name Poverty
Female Unemployed29.40%
Male Unemployed28.52%
Female Employed6.50%
Male Employed4.68%

Washington Income

Washington Income by Household Type

Name Median Mean
Married Families$97,444$123,325
Non Families$43,327$61,081

Washington Marital Status

Washington Marital Status

Marriage Rates


Overall Marriage Rate


Male Marriage Rate


Female Marriage Rate

Washington Married by Age and Sex

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.

Washington Marital Status by Race

Washington Veterans


Number of Veterans


Male Veterans


Female Veterans

War Veterans
First Gulf War123,495
Second Gulf War112,350
World War II19,302
Age Group Veterans
35 to 54137,438
65 to 74137,393
55 to 64105,190
18 to 3452,917
Name Veterans % of Total
2 or More16,2277.23%

$Washington Veterans by Education


Veteran Poverty Rate


Veteran Disability Rate

Washington Employment Status


Labor Force Participation


Employment Rate


Unemployment Rate

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


Born in Washington


Native Born


Foreign Born


Non Citizen

Place of Birth

86.00% of Washington residents were born in the United States, with 47.00% having been born in Washington. 7.36% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.