Sin Dios (English: Without God) was a hardcore/anarcho-punk band from Spain that formed in 1988 in Madrid. Their first gigs were held in squatted houses (in Spanish casas okupadas). In 1990 they released their first demo "...Ni amo" It contained 13 tracks and took them to their first tour across Spain, always playing within autonomous and libertarian surroundings. In 1991, they recorded with another band a split album, Ruido Anticapitalista (Anticapitalist Noise), produced by the band's Potential Hardcore (alternative label). Since then, they have produced five albums and many EPs and compilations. They were also on numerous concert tours across Europe, Latin America and Japan.
On 30 July 2006, the band announced that it would "cease its musical activity". The announcement was followed among other things by "TO OUR ENEMIES: WE CONTINUE ON OTHER FRONTS" and by denunciations to the Israeli aggression, American imperialism and the like.