Mark August Stoermer is an American musician. He is best known as the bassist for the rock band the Killers, with whom he has recorded six studio albums.

The Killers are an American rock band formed in Las Vegas in 2001 by Brandon Flowers and Dave Keuning. After going through a number of short-term bass players and drummers in their early days, both Mark Stoermer and Ronnie Vannucci Jr. joined the band in 2002. The band's name is derived from a logo on the bass drum of a fictitious band portrayed in the music video for the New Order song "Crystal".