Diego Demme (born 21 November 1991) is a German professional footballer[3] who plays as a defensive midfielder for 2.

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.

[7] 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.

[8] 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.

[17] Although he suffered an injury during a 2–1 loss against Eintracht Braunschweig on 24 August 2012,[18] Demme was then sent–off early in the second–half for a foul on Jan Hochscheidt, in a 1–0 win over Erzgebirge Aue on 16 September 2012.

[29] After his return from injury, Demme later regained his first place in the midfield position, making the total of 19 appearances for the side.

[33] Demme made his RB Leipzig debut, starting the whole game, in a 1–0 loss against Wacker Burghausen on 25 January 2014.

[35] Since making his debut for the club, Demme quickly established himself in the first team towards the end of the season, at the midfield position.

[38] At the start of the 2014–15 season, Demme continued to regain his first team place, as he played in midfield positions.

[44] He then made his return from injury in a follow-up match against Greuther Fürth on 3 August 2015, coming on as a late substitute, in a 2–2 draw.

[45] After appearing on the substitute bench in a number of matches, Demme soon regained his first team place, due to the club's shortage of midfielders.

[46] He then established himself in the starting eleven for the side, in the midfield position[47] and helped the club gain promotion to the Bundesliga after beating Karlsruher SC 2–0 on 8 May 2016.

[54] Demme then captained RB Leipzig for the first time in his career in absence of Kaiser on 19 February 2017, in a 2–1 win over Borussia Mönchengladbach.

Ahead of the 2017–18 season, Demme and Willi Orban were among two candidates to be given a captain role by Manager Ralph Hasenhüttl, succeeding Kaiser.

[64] After the match, Manager Hasenhüttl praised Demme's return, saying: "He was very active today, always wanted to push things forward and is enormously important with his view of the pitch, because he tries to put the ball in the front half.

[66] He then played his first UEFA Champions League match, starting the whole game, in a 1–1 draw against AS Monaco on Matchday 1 of the Group Stage.

[69] He went on to captain the side five more times later in the 2017–18 season in the absence of Orban and contributed three wins, including against Bayern Munich and Hertha BSC.

[74] Demme continued to regain his first team place at RB Leipzig, playing in the defensive position.

"[80] Demme was first called up to the Germany national team in 2017, for the friendly against Denmark on 6 June 2017, for the 2018 World Cup qualification match against San Marino on 10 June 2017, in which he made his international debut, and for the Confederations Cup, but withdrew from the squad ahead of the tournament due to a back injury.