Washington Population 2018

7,530,552

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. It has a population to match its considerable size, as well, with an estimated population of 7.53 million in 2018.

The US Census Bureau 2015 estimate show 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.

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.

Washington Population 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 Population Chart

Washington Population History

Like many areas in the far west 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.

That has progressed again through the present day where the population of Washington State in 2016 has surpassed 7 million.

Population Projections for Washington

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.

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.

Population Data via US Census

Washington Growth Rate

Washington Population Rank

Year Pop % Change
20207,780,1701.63%
20197,655,3611.66%
20187,530,5521.69%
20177,405,7431.71%
20167,280,934Infinity%
20167,073,146-1.11%
20157,152,8181.50%
20147,046,9311.20%
20136,963,4101.05%
20126,890,8991.05%
20116,819,1551.15%
20106,741,3861.35%
20005,894,1211.93%
19904,866,6921.65%
19804,132,1561.94%
19703,409,1691.80%
19602,853,2141.83%
19502,378,9633.20%
19401,736,1911.05%
19301,563,3961.43%
19201,356,6211.74%
19101,141,9908.22%
1900518,1033.79%
1890357,23216.88%
188075,11612.11%
187023,9557.53%
186011,59425.45%
18501,2010.00%

Washington Facts

Washington Population in 2018Source: By Daniel Schwen [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], from Wikimedia Commons

  • Tumwater was the first settlement in the state of Washington. It was settled in 1846 and was named New Market.
  • It was found that over half of the 5.9 million residents recorded during the 2000 Census were employed by the state.
  • Over 10% of the state's population is foreign born, and over 1% of the population is comprised of illegal immigrants.
  • Washington is just one of seven states that does not have a personal income tax.
  • Seattle has the highest percentage of residents in the US holding a college degree.
  • Washington has the most glaciers of any state in the contiguous US.
  • Washington is home to over 1,000 dams, including the Grand Coulee, the largest in the nation.

Washington Population Density by County

King County

  • Population2,188,649
  • Density1034.56 per sq km
  • Growth Since 201012.97%
  • State Rank1
  • % of State29.55%

Washington Population Growth Rate by County

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
White5,470,566
Asian552,032
Two or More Races377,703
Some Other Race276,959
Black or African American256,990
American Indian and Alaska Native94,026
Native Hawaiian and Other Pacific Islander44,870

Race Data via US Census (2016 ACS 5-Year Survey)

Washington Population Pyramid 2018

0%2%4%6%8% Male Population0%2%4%6%8% Female Population80757065605550454035302520151050

Data via US Census (2016 ACS 5-Year Survey): Table S0101

Washington Median Age

37.6


Total

36.6


Male

38.6


Female

Washington Adults

There are 5,467,542 adults, (990,240 of which are seniors) in Washington.

Washington Age Dependency

58

Age Dependency Ratio

22.2

Old Age Dependency Ratio

35.9

Child Dependency Ratio

Washington Sex Ratio

Female

3,543,715

50.10%

Male

3,529,431

49.90%

Washington Households and Families

Washington Renter vs Owner Occupied by Household Type

Washington Household Types

Type Owner Renter
Married78.1%21.9%
All62.4%37.6%
Male49.4%50.6%
Non Family47%53%
Female45.1%54.9%

62.4%

Rate of Home Ownership

Washington Households by Type

Type Count Average Size Owned
All2,696,6062.5762.4
Married1,345,6593.278.1
Non Family958,3931.3447
Female272,4313.3845.1
Male120,1233.4249.4

3.14

Average Family Size

2.57

Average Household Size

6.6%

Unmarried (Opposite Sex)

0.5%

Unmarried (Same Sex)

Washington Households

Washington Education

Washington Educational Attainment by Sex (over 25)

Education Attained Count Percentage
Less Than 9th Grade189,0273.93%
9th to 12th Grade263,4695.48%
High School Graduate1,101,15622.92%
Some College1,168,71324.33%
Associates Degree469,7009.78%
Bachelors Degree1,022,11721.28%
Graduate Degree590,04212.28%

Washington Educational Attainment by Race

Name Total High School Bachelors
White3,628,7153,420,6131,272,936
Hispanic417,680264,92260,430
Asian389,319337,642193,275
Black161,979142,70435,738
Multiple Races154,400140,26144,512
Other Race143,61979,80514,925
Native American57,56447,3747,391
Islander26,46922,9033,008

The highest rate of high school graduation is among white people with a rate of 94.27%.

The highest rate of bachelors degrees is among white people with a rate of 49.64%.

Washington Earnings by Educational Attainment

Name Average Male Female
Overall$40,827$49,839$32,229
Less Than High School$23,202$26,969$18,223
High School Grad$31,435$37,848$24,856
Some College$36,796$45,929$30,098
Bachelors Degree$55,241$69,917$43,267
Graduate Degree$71,080$89,467$58,600

$40,827

Average Earnings

$49,839

Average Male

$32,229

Average Female

Washington Language

Washington Language by Age

Washington Language

80.99% of Washington residents speak only English, while 19.01% speak other languages. The largest non-English language is Spanish, which is spoken by 8.39% of the population.

Washington Poverty

Washington Poverty by Race

Name Total In Poverty Poverty Rate
White4,892,990495,48010.13%
Hispanic837,872192,13822.93%
Other272,02064,13523.58%
Asian543,75761,89911.38%
Multiple366,28160,48816.51%
Black247,11759,55124.10%
Native90,65824,24626.74%
Islander43,8807,94618.11%

12.73%

Overall Poverty Rate

11.75%

Male Poverty Rate

13.70%

Female Poverty Rate

Poverty in Washington

The race most likely to be in poverty in Washington is Native, with 26.74% below the poverty level.

The race least likely to be in poverty in Washington is White, with 10.13% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.98%. Among those working part-time, it was 16.67%, and for those that did not work, the poverty rate was 20.20%.

Washington Poverty Rate by Education

Name Poverty
Less Than High School23.81%
High School12.97%
Some College10.07%
Bachelors or Greater4.39%

Washington Poverty Rate by Employment Status and Sex

Name Poverty
Female Unemployed31.17%
Male Unemployed29.40%
Female Employed7.23%
Male Employed5.25%

Washington Income

Washington Income by Household Type

Name Median Mean
Households$62,848$84,022
Families$76,507$98,185
Married Families$88,592$111,389
Non Families$39,131$54,528

Washington Marital Status

Washington Marital Status

Marriage Rates

50.6%

Overall Marriage Rate

51.5%

Male Marriage Rate

49.7%

Female Marriage Rate

Washington Married by Age and Sex

Washington Marriage

The age group where males are most likely to be married is Over65, while the female age group most likely to be married is 35To44.

Washington Marital Status by Race

Washington Veterans

Washington Veterans by War

552,863

Number of Veterans

501,720

Male Veterans

51,143

Female Veterans

Name Veterans
Vietnam204,272
First Gulf War119,242
Second Gulf War97,523
Korea46,235
World War II27,480

Washington Veterans by Age

Name Veterans
35 to 54145,247
65 to 74135,266
55 to 64115,202
75+106,232
18 to 3450,916

Washington Veterans by Race

Name Veterans % of Total
White483,52911.22%
Black26,70414.29%
Hispanic22,7434.38%
2 or More15,4877.71%
Asian13,2713.00%
Indian5,9388.73%
Other4,9012.71%
Hawaiian3,0339.61%

Washington Veterans by Education

6.69%

Veteran Poverty Rate

28.16%

Veteran Disability Rate

Washington Employment Status

Washington Employment by Age

64.2%

Labor Force Participation

59%

Employment Rate

6.8%

Unemployment Rate

Washington Employment by Race

Washington Employment by Education

Washington Nativity

Washington Citizenship Status

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