97Hoquiam8,789-0.0% 98Milton8,693-0.0% 99Ephrata8,6650.7% 100Toppenish8,650-0.7% What is the largest city in Washington? The largest city in Washington isSeattle, with a population of 755,078.Seattleis the 18th largest city in the US. The second largest city isSpokane, with a populatio...