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.

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 Demographics Notes

Age/Sex, Race, and Religion

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 are female and 49.9% males.

The racial diversity among the residents of Washington is currently at 77.3% Caucasians, 7.8% Asians, 5.3% two or more races, 3.9% other races, 3.6% African American, and 1.9% Natives of North America.

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 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 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%
20167,280,9341.79%
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

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
White5,500,837
Asian578,822
Two or More Races394,733
Some Other Race293,007
Black or African American261,743
American Indian and Alaska Native94,754
Native Hawaiian and Other Pacific Islander46,071

Data via US Census (2017 ACS 5-Year Survey): Table B03002

Washington Population Pyramid 2018

50,000100,000150,000200,000250,000 Male Population50,000100,000150,000200,000250,000 Female Population80757065605550454035302520151050

Data via US Census (2017 ACS 5-Year Survey): Table S0101

Washington Median Age

37.6


Total

36.6


Male

38.7


Female

Washington Adults

There are 5,554,591 adults, (1,029,040 of whom are seniors) in Washington.

Washington Age Dependency

58.4

Age Dependency Ratio

22.7

Old Age Dependency Ratio

35.7

Child Dependency Ratio

Washington Sex Ratio

Female

3,589,079

50.06%

Male

3,580,888

49.94%

Washington Households and Families

Washington Renter vs Owner Occupied by Household Type

Data via US Census (2017 ACS 5-Year Survey): Table S1101

Washington Household Types

Type Owner Renter
Married78.2%21.8%
All62.7%37.3%
Male50.7%49.3%
Non Family46.8%53.2%
Female46.1%53.9%

62.7%

Rate of Home Ownership

Washington Households by Type

Type Count Average Size Owned
All2,755,6972.5562.7
Married1,381,9193.1878.2
Non Family973,1581.3446.8
Female275,4553.3146.1
Male125,1653.3250.7

3.1

Average Family Size

2.55

Average Household Size

6.8%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

Washington Households

Washington Education

Washington Educational Attainment by Sex (over 25)

Education Attained Count Percentage
Less Than 9th Grade188,2003.84%
9th to 12th Grade260,3585.32%
High School Graduate1,101,90422.51%
Some College1,174,69623.99%
Associates Degree483,5499.88%
Bachelors Degree1,064,44021.74%
Graduate Degree622,90812.72%

Washington Educational Attainment by Race

Name Total High School Bachelors
White3,664,1913,462,3651,318,711
Hispanic435,995281,27066,077
Asian413,040360,508209,598
Black166,428147,42338,665
Multiple Races164,267150,07049,357
Other Race153,61186,05816,122
Native American58,05848,0637,630
Islander27,47924,3373,360

The highest rate of high school graduation is among white people with a rate of 94.49%.

The highest rate of bachelors degrees is among white people with a rate of 50.75%.

Washington Earnings by Educational Attainment

Name Average Male Female
Overall$42,114$51,221$34,035
Less Than High School$24,579$29,001$18,932
High School Grad$32,246$39,642$25,629
Some College$37,871$47,385$30,814
Bachelors Degree$57,143$72,018$45,188
Graduate Degree$73,579$92,442$60,911

$42,114

Average Earnings

$51,221

Average Male

$34,035

Average Female

Washington Language

Washington Language by Age

Washington Language

80.90% of Washington residents speak only English, while 19.10% speak other languages. The largest non-English language is Spanish, which is spoken by 8.38% of the population.

Washington Poverty

Washington Poverty by Race

Name Total In Poverty Poverty Rate
White4,916,673483,4659.83%
Hispanic865,738186,18821.51%
Other288,19165,73522.81%
Asian570,72460,42210.59%
Multiple383,34460,15315.69%
Black251,91957,24822.72%
Native91,41823,17025.35%
Islander45,0577,91817.57%

12.22%

Overall Poverty Rate

11.31%

Male Poverty Rate

13.12%

Female Poverty Rate

Poverty in Washington

The race most likely to be in poverty in Washington is Native, with 25.35% below the poverty level.

The race least likely to be in poverty in Washington is White, with 9.83% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.92%. Among those working part-time, it was 16.14%, and for those that did not work, the poverty rate was 19.73%.

Washington Poverty Rate by Education

Name Poverty
Less Than High School22.98%
High School12.69%
Some College9.93%
Bachelors or Greater4.34%

Washington Poverty Rate by Employment Status and Sex

Name Poverty
Female Unemployed30.51%
Male Unemployed29.39%
Female Employed6.86%
Male Employed5.06%

Washington Income

Washington Income by Household Type

Name Median Mean
Households$66,174$88,563
Families$80,233$103,318
Married Families$92,675$116,910
Non Families$40,950$57,323

Washington Marital Status

Washington Marital Status

Marriage Rates

51.0%

Overall Marriage Rate

51.8%

Male Marriage Rate

50.2%

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


Data via US Census (2017 ACS 5-Year Survey): Table S1201

Washington Veterans

Washington Veterans by War

541,122

Number of Veterans

488,697

Male Veterans

52,425

Female Veterans

Name Veterans
Vietnam199,478
First Gulf War120,441
Second Gulf War105,359
Korea42,164
World War II22,340

Washington Veterans by Age

Name Veterans
35 to 54139,312
65 to 74136,065
55 to 64109,690
75+104,274
18 to 3451,781

Washington Veterans by Race

Name Veterans % of Total
White470,78110.84%
Black26,63913.95%
Hispanic22,9964.26%
2 or More15,7607.45%
Asian13,7352.94%
Indian5,9378.69%
Other5,1102.67%
Hawaiian3,1609.56%

Washington Veterans by Education

6.48%

Veteran Poverty Rate

28.58%

Veteran Disability Rate

Washington Employment Status

Washington Employment by Age

64.3%

Labor Force Participation

59.6%

Employment Rate

6%

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)