Saidy Janko (born 22 October 1995) is a Swiss footballer who currently plays for Young Boys on loan from FC Porto.
Although Janko is primarily recognised as a right-back, he is equally capable of playing on the right wing. Born in Zürich to a Gambian father and a Swiss/Italian mother, Janko began his career with FC Zürich before signing for Manchester United in 2013. After a loan spell with Bolton Wanderers, Janko moved to Scottish club Celtic in 2015. He spent the 2016–17 season on loan to Barnsley before moving to Saint-Étienne permanently in July 2017. He has played international football for Switzerland up to under-21 level.
Janko joined Manchester United from FC Zürich on summer transfer deadline day in 2013. He was one of only three signings made by David Moyes during the 2013 summer transfer window. In his first season, he was voted the Reserve Player of the Year. On 26 August 2014, he made his first-team debut in a League Cup match against Milton Keynes Dons, playing the first half before being substituted for fellow debutant Andreas Pereira as United lost 4–0.