Jakub Vadlejch (Czech pronunciation: ['jakub 'vadl?jx]; born 10 October 1990) is a Czech track and field athlete who competes in the javelin throw.
He is a two-time Olympian for the Czech Republic, having competed in 2012 and 2016.
He also has represented his country thrice at the World Championships in Athletics (2011, 2015, 2017), winning the silver medal in 2017, and twice was a competitor at the European Athletics Championships (2010, 2014).