Wikipedia
Steamcon
Steamcon was one of the largest steampunk conventions/ symposia in the United States. Located in the Seattle area of Washington state, Steamcon held its first symposium in 2009.
Steamcon grew out of the desire of its founders to host a steampunk event in greater Seattle. The idea to start the event was hatched at the local science fiction convention Norwescon in 2008 when multiple people expressed an interest to hold an event devoted exclusively to steampunk. Although the idea for a Seattle area Steampunk convention referred to as SteamCon was first used as the basis for a panel at Anglicon 6 in Seattle in May 1993.