The population of the city of Seattle, in the U.S. state of Washington, was 737,015 in the 2020 United States census. Only about a fifth of the households include minor children, and more people live alone here than any other U.S. city besides San Francisco. Seattle's population is mostly white, with a relatively large minority of Asians. It has the largest African American population in the area and a Latino population that is growing quickly. About half the population are Christians (mostly Protestants) and about a third are unaffiliated.