John "Johnny" Roadhouse (13 January 1921 – 11 April 2009) was a British musician who specialised in saxophone.
Roadhouse was born in Sheffield, but lived in Manchester from an early age. He taught himself how to play the saxophone. Originally an aircraft fitter with Metropolitan-Vickers at Trafford Park, he began to play with local dance groups during his spare evenings. He got his first big break when he became a member of the Teddy Foster orchestra in 1948. He later went on to join the BBC Northern Variety Orchestra in 1953.
He opened up his music store, Johnny Roadhouse Music in 1955. His store became a cornerstone for Manchester music and was used by several famous musicians and groups including Paul McCartney, Oasis and The Smiths. In his retirement he passed the running of the store over to his son, John Roadhouse.