Diego Demme (born 21 November 1991) is a German professional footballer who plays as a defensive midfielder for Bundesliga club RB Leipzig and the Germany national team.
Born in Herford, Germany, Demme began playing football at a young age and played for various youth teams, such as, SpVg Hiddenhausen, SV Sundern, SV Enger-Westerenger and JSG Kirchlengern Stift Quernheim before joining Arminia Bielefeld, where he started off his professional career. He then signed a contract in 2008.
Having progressed through the academy and Arminia Bielefeld II, Demme was called up to the first team in early–December for the first time and made his debut for the first team, starting the whole game, in a 4–1 loss against Greuther Fürth on 4 December 2010. After making his debut for the club, his performance was praised. Following this, Demme had a handful of first team football until February when he found himself behind the pecking order from competitions in the midfield position. Despite spending time on the bench, in numbers of games towards the end of the 2010–11 season, Demme went on to make 10 appearances in all competitions. At the end of the 2010–11 season, he signed a one–year contract extension with the club.