Mark August Stoermer (born June 28, 1977) is an American multi-instrumentalist and record producer. He is best known as the bass guitarist and occasional rhythm guitarist for the rock band The Killers, with whom he has recorded four studio albums.

In addition to his work with The Killers, Stoermer has released three solo albums, Another Life in 2011, and Dark Arts in 2016, and Filthy Apes and Lions in 2017.