Replicas is the second and final studio album by the English new wave band Tubeway Army, released on 4 April 1979 by Beggars Banquet Records. It followed their self-titled debut from the previous year. After this, Tubeway Army frontman Gary Numan would continue to release records under his own name, though the musicians in Tubeway Army would continue to work with him for some time. Replicas was the first album of what Numan later termed the "machine" phase of his career, preceding The Pleasure Principle (1979) and Telekon (1980), a collection linked by common themes of a dystopian science fiction future and transmutation of man/machine, coupled with an androgynous image and a synthetic rock sound.

Tubeway Army were a London-based new wave band led by lead singer Gary Numan. Formed at the height of punk rock in 1977 the band gradually changed to an electronic sound. They were the first band of the electronic era to have a synthesiser-based number-one hit, with their single "Are 'Friends' Electric?" and its parent album Replicas both topping the UK charts in mid-1979. After its release, Numan opted to drop the Tubeway Army name and release music under his own name as he was the sole songwriter, producer and public face of the band, but he retained the musicians from Tubeway Army as his backing band.