Jack Robert Culcay-Keth (born 26 September 1985 in Ambato, Ecuador) is an Ecuador-born German professional boxer.
As an amateur he represented Germany, fighting at the 2008 Summer Olympics in the welterweight division, and winning a silver medal at the 2008 European Championships and gold at the 2009 World Championships.
He held the WBA interim super welterweight title between 2015 and 2017.