Algona is a city in King County, Washington, United States, and the Seattle metropolitan area, surrounded by the suburbs of Auburn to the north and east, Pacific to the south, and unincorporated King County to the west. The population was 3,290 as of the 2020 census. Due to Algona's adjacency to the city of Pacific, the two communities are sometimes referred to collectively as Algona-Pacific or Algona/Pacific.