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. As of a 2019 estimate, less than 30% of adults in Seattle were born in Washington state, with the majority born in other parts of the United States. Approximately 20 percent were born abroad. Population As of the U.S. Census of 2000, there were 563,374 people, 258,499 households, and 113,481 families residing in the city of Seattle. The population density was 2,593.5/km2 (6,717.0/mi2). There were 270,524 housing units at an average density of 1,245.4/km2 (3,225.4/mi2). During the day, incoming commuters increase Seattle's population by about 30%. According to Census 2010, there were a total of 283,510 households in Seattle. Of these, 42.9% were family households and 57.1% were non-family households. A total of 19.5% of households had children under 18 years, and 17.6% had someone over the age of 65. The average household size was 2.06, while the average family size was 2.87. The city is second-last in terms of households with children, with only 19.1% of households reporting children under 18 living with them. Only San Francisco has a lower percentage of families with children. Seattle also sports the fifth-highest percentage of adults living alone in the country. In the city the population was spread out, with 15.6% under the age of 18, 11.9% from 18 to 24, 38.6% from 25 to 44, 21.9% from 45 to 64, and 12.0% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 99.5 males. For every 100 females age 18 and over, there were 98.8 males. The median income for a household in the city was $45,736, and the median income for a family was $62,195. Males had a median income of $40,929 versus $35,134 for females. The per capita income for the city was $30,306. 11.8% of the population and 6.9% of families were below the poverty line as were 13.8%