The Washington Science Fiction Association (WSFA) is the oldest science fiction club in the Washington, D.C. area. It is also one of the oldest science fiction clubs, founded in 1947 by seven fans who met at that year's Worldcon in Philadelphia, the fifth Worldcon held. On January 5, 1963, club members from Baltimore were trapped on a Trailways bus when returning to Baltimore after a WSFA meeting. The Baltimore Science Fiction Society was formed on the backseat of the bus. In 2007, the WSFA inaugurated the WSFA Small Press Award. WSFA is incorporated as a 501(c)(4) non-profit organization.