The Seattle Sounders were an American professional soccer team that was founded in 1994 and played in several second-division leagues, beginning with the American Professional Soccer League. They played in the A-League, later renamed the USL First Division, from 1997 to 2008. The team was named for the Seattle Sounders of the North American Soccer League (NASL), which folded in 1983. The Sounders folded after the 2008 season as part of a transition to a new Major League Soccer (MLS) team named Seattle Sounders FC that debuted in 2009.

The Seattle Sounders were an American professional soccer team based in Seattle, Washington. Founded in 1974, the team belonged to the North American Soccer League where it played both indoor and outdoor soccer. The team folded after the 1983 NASL outdoor season but the name was revived in 1994 for a lower-division team and Seattle Sounders FC of the top-flight Major League Soccer, founded in 2007.