CD Reus was founded on 23 November 1909 after the dissolution of Reus Sport Club. On 29 September 1917, the club merged with Club Velocipedista and SC Olímpia becoming the multi-sports club Reus Deportiu. In 1951, Reus Deportiu was restructured into two independent entities: CF Reus Deportiu, entirely dedicated to football, and Reus Deportiu, supporting the other sports, roller hockey being the most well known. After several years playing in Segunda División B, Reus qualified in 2015 to the promotion play-offsfor the first time in its history. It was defeated in the second round by Racing Ferrol. In 2015, the club reached the round of 32 of the 2015–16 Copa del Rey, where it was defeated by Atlético Madrid. In that season, the club also qualified to the promotion play-offs, this time as champion of the Segunda División B Group 3. In the first leg, Reus beat Racing de Santander by 3–0 away, and achieved the first promotion ever to Segunda División after a 1–0 home win in the second leg, played on 29 May 2016. On 18 January 2019, the Liga de Fútbol Profesional suspended the rights of Reus to continue competing in the competition and ten days later the club was expelled from the competition for three years plus a fine of €250,000 due to the nonpayment of players' salaries. In July 2019, after the draw of the groups for the 2019–20 Segunda División B, Reus was excluded again due to the nonpayment and relegated to Tercera División, from which the club was expelled in September for the non-payment of its debt with the RFEF and non-appearance in the first two matches. It was also ruled that the club could not play in the three Catalan regional leagues until its debts were settled. In October 2019, the Court of Arbitration for Sport ordered that Reus be reinstated to Segunda B.
