OZ was an underground London magazine first published in the 1960s.

Issue 28, otherwise known as "Schoolkids OZ" became a cause celebre during and following the prosecution of its editors Richard Neville, Jim Anderson and Felix Dennis for obscenity in 1973. This prosecution brought the magazine to the attention of a far wider public than would have been the case had it simply been ignored. John Lennon and Yoko Ono joined the protest march against the prosecution and organised the recording of "God Save Oz" by the Elastic Oz Band, released on Apple Records, to raise funds and get publicity.