Jakub Jankto (born 19 January 1996) is a Czech professional footballer who plays as a midfielder for Serie A club Sampdoria and the Czech Republic national team.
Jankto signed for Udinese from Slavia Prague in 2014 for a reported fee of €700,000. Without making his league debut for the team, he went on loan to Serie B side Ascoli in 2015.
He made his career league debut for Ascoli on 15 September 2015 in a Serie B 1–0 home win against Virtus Entella.
On 6 July 2018, Sampdoria announced that Jankto had joined the club on an initial loan deal with an option to make the transfer permanent for €15 million. On 12 August 2018, Jankto scored on his debut for Sampdoria in a 1–0 Coppa Italia win against Viterbese. Sampdoria later made the transfer permanent.