"Protomartyr" is an American post-punk band formed in 2010 in Detroit, Michigan. It features Joe Casey on vocals, Greg Ahee on guitar, Alex Leonard on drums and Scott Davidson on bass guitar. Prior to Protomartyr, Greg Ahee and Alex Leonard were performing as a duo, which was named Butt Babies. They were soon joined by Joe Casey, who started to perform on vocals at Butt Babies shows. Kevin Boyer of Tvyek joined Protomartyr on bass and second guitar for a short time before leaving the act due to the working schedules with his other band.

As Scott Davidson joined the band on bass, Butt Babies transformed into Protomartyr. The band's music has been labeled as post-punk and punk rock.

Josh Terry of Consequence of Sound stated that the band "blends the moody atmospherics of ‘70s U. K.

post-punk with the raw sensibility of their Motor City garage-rock forebears. " The band's sound was compared to other post-punk acts such as Wire, the Fall, Pere Ubu, the Constantines and Iceage.