Jacobus Meyer "Cobus" Reinach (born 7 February 1990) is a South African international rugby union footballer. He represents the Sharks in Super Rugby and the Natal Sharks in the Currie Cup. His playing position is scrum-half and he is the son of former Springbok winger Jaco Reinach.
Born and raised in Bloemfontein, Reinach attended the famous rugby school Grey College. He initially played age-level rugby for the Free State, before heading to Durban in 2009 to link up with the Sharks. His first forays into senior rugby came with the Sharks XV in the Vodacom Cup. During the 2011 and 2012 Vodacom Cup competitions he made 17 appearances and scored 3 tries. His good performances at that level saw him promoted to the Natal Sharks Currie Cup squad. He earned his first 2 Currie Cup caps during the 2011 season and over the following 2 campaigns he rotated with the more experienced Charl McLeod for the starting role in the number 9 jersey. He was a Currie Cup winner in 2013 and a runner up in 2012 with both matched being played against Western Province. Following McLeod's departure to Grenoble at the conclusion of the 2014 Super Rugby season, Reinach was left as the undisputed first-choice scrum half for the Sharks.