The Nekromantix were formed in 1989 in Copenhagen by Kim Nekroman after he left the Danish Navy, in which he had been a submarine radio operator. Deciding to launch a new career in music, he initially played drums in a rockabilly band prior to the foundation of Nekromantix. Learning to play the double bass and to sing, Nekroman set about forming a horror-themed psychobilly band with himself as the frontman. The band lineup is currently rounded out by Franc (guitar) and Lux (drums).

The band played two local shows in Copenhagen before appearing in a large psychobilly festival in Hamburg, Germany only six months after the band's formation. This lead to a record deal for their first album, Hellbound. Nekromantix began touring Europe heavily. At the time, the psychobilly scene was largely dominated by English bands. The band recorded a second album in 1991, Curse of the Coffin which resulted in some MTV play. 1994's Brought Back to Life became the only psychobilly album so far to ever be nominated for a Grammy award.

The band was signed to Hellcat Records in 2001, due to record label owner Tim Armstrong of punk rock band Rancid being a long-time fan of the band. Their fifth album and USA debut, Return of the Loving Dead, was recorded in Los Angeles and released in 2002. A sixth album, Dead Girls Don't Cry, was released for Hellcat in 2004, with Nekroman recording bass and vocals in Los Angeles while the Sandorff brothers recorded their respective parts back in Denmark.

In April 2005, the Sandorff brothers departed from the Nekromantix on good terms, citing their reason for leaving as "it wasn't funny anymore". They were replaced with guitarist Troy and drummer Wasted James, both from California-based psychobilly group Rezurex. Wasted James also plays in Tiger Army, and formerly played as the Nekromantix touring drummer. Andy Demize is now drummer for Nekromantix and features on the new 2007 album 'Life Is A Grave & I Dig It!'

Kim Nekroman is married to Patricia Day, ex-guitarist of Danish band Peanut Pump Gun. They play in rockabilly band called HorrorPops together.

Kim Nekroman's signature coffinbass has gone through many incarnations, the first of which being fashioned out of an actual child's coffin. The child's coffin, however, did not produce an excellent sound, so Nekroman built another himself with better acoustics. Over the years he has made a handfull of the instruments, the most recent update being collapsable for easier transportation.

The Nekromantix are a Danish-American psychobilly band formed in 1989 in Copenhagen, Denmark and currently recording for Hellcat Records. Their music is generally structured around monster and horror themes which are reflected in their album and song titles, lyrics, artwork, and stage show. A central icon of the band's image is bassist/vocalist Kim Nekroman's "coffinbass", a custom-built, very deep double bass with a body in the shape of a coffin and a headstock the shape of a cross.

The band has had changing lineups throughout its career, with founder Kim Nekroman as the sole constant member. The current line-up consists of Nekroman, guitarist Franc, and drummer Lux. Throughout the band's first 11 years they released five albums on various European record labels, which were only available in the US as imports. The group crossed over to American audiences in the early 2000s by signing to the Los Angeles-based Hellcat Records label, through which they have released three albums since 2002. The Nekromantix' eighth album, Life Is a Grave & I Dig It!, was released in April 2007.