Washington Population 2018


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

Washington Facts

Washington Population in 2018Source: Joshulove

  • 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

  • Population2,155,962
  • Density1019.10 per sq km
  • Growth Since 201011.28%
  • State Rank1
  • % of State29.61%

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.

Washington Population Pyramid 2018

0k10k20k30k40k50kWashington Male Population0k10k20k30k40k50kWashington Female Population80757065605550454035302520151050

To compare Washington to other states, click here.

Population by Race

Race Population
Two or More Races414,136
Some Other Race350,251
Black or African American266,977
American Indian and Alaska Native94,637
Native Hawaiian and Other Pacific Islander48,182

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.

Race Data via US Census (2016 ACS 1-Year Survey)

Languages Spoken in Washington

Language Population Percentage

This chart shows the top 10 languages that are spoken at home in Washington. The data comes from the most recent release of the American Community Survey (ACS).

Washington Economy

High school graduate or higher 90.2%
Bachelor's degree or higher 32.3%
With a Disability 8.8%
Persons Without Health Insurance 10.6%
In Civilian Labor Force 63.8%
In Civilian Labor Force (Female) 58.9%
Food Services Sales $14,297,278
Health Care Revenue $43,966,889,000
Manufacturers Shipments $131,530,601,000
Merchant Wholesaler Sales $83,313,366,000
Total Retail Sales $118,924,049,000
Total Retail Sales per Capita $17,243
Mean Travel Time to Work 25.9 minutes
Median Household Income $60,294
Per Capita Income (past 12 months) $31,233
Persons in Poverty 13.2%

This chart shows the employment and labor force participation rates in Washington for residents over 16 years of age. The 2015 unemployment rate is 5% and the labor force participation rate is 64.4%.

Washington Business

Total Nonemployer Establishments 430,670
All firms 541,522
Men-owned Firms 262,650
Women-owned Firms 187,677
Minority-owned Firms 92,807
Nonminority-owned Firms 426,697
Veternan-owned Firms 49,331
Nonveteran-owned Firms 461,401

Washington Housing

Housing Units 2,885,677
Owner Occupied Housing Rate 62.7%
Median Value Owner Occupied Housing Units $257,200
Median Monthly Owner Costs (w/Mortgage) $1,764
Median Monthly Owner Costs (no mortgage) $509
Median Gross Rent $995
Building Permits 40,374
Households 2,645,396
Persons per Household 2.55 persons
Living in Same House 1 Year Ago 82.6%
Language Other than English Spoken at Home 18.8%
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)