We need to know if you are asking about the state of Washington.
The 5 largest cities in Washington are Seattle, Spokane, Tacoma, Vancouver, and Bellevue. The current estimated population of the state as of 2012 is 6,897,012.
New York City, NY San Francisco, CA Jersey City, NJ Boston, MA Chicago, IL
http://en.wikipedia.org/wiki/List_of_cities_in_Washington List has the population of every city in Washington.
SeattleSpokaneTacomaVancouverEverettSpokane valleyFederal wayKentYakimathese are the top ten (10) cities in Washington
Washington and Richmond
Houston which ranks as the fourth largest US City by population.
The state of Washington has hundreds of cities, but there are three that stand out as the major settlements. Seattle, Spokane, and Tacoma are not only county seats, they are the three largest cities in Washington state, each with populations over 200,000. It should be noted that Seattle stands out furthermore as the major city, having a population over 600,000 (and an urban population of millions) whilst Spokane and Tacoma are only slightly above 200,000 in population.
Oregon.
The cities are approximately 1,409 miles apart.
The most populous cities in Washington are Seattle, Spokane, Tacoma, Leavenworth and Bellevue.
On Amtrak, it is 424 miles between Providence and Washington. There are regular Acela and Northeast Regional trains between the two cities.
Bellevue with a 122,363 porulation. Everett with a 103,019 population. Seattle with a 608.660 population. Spokane with a 208,916 Population. Tacoma with a 198.39 populsation. Vancouver with a 181,792 population.