Stagecoach Sheffield is a bus operator based in Sheffield, England, a subsidiary of the Stagecoach Group. It was formed from the Sheffield based operations of the Yorkshire Traction Group, purchased by Stagecoach in 2005. Most bus services in Sheffield are operated by Stagecoach Sheffield or First South Yorkshire. Stagecoach Sheffield services are marketed alongside the Sheffield Supertram, operated by Stagecoach since 1997. Stagecoach Sheffield also operate the related SupertramLink bus.