Stade Rennais Football Club was formed on March 10, 1901 by an old group of students from Brittany. The sport quickly became widely played in the surrounding regions, and soon it was introduced to Brittany. The first game of the club was played two weeks later , against FC Rennais, which Stade was defeated in a 6-0 loss. The year 1902 saw Stade Rennais joined the USFSA Federation and later it became an official participant in the Ligue de Bretagne de football which was a new regional league that was created in 1902 by the FSA federation. In the second season of the league they won the tournament after beating the first league champions FC Rennais 4-0 in the final. The 4th of May 1904 was the day that Stade Rennais merged with its competitors FC Rennais to form Stade Rennais Universite Club which had the main goal of beat the dominance in the Ligue de Bretagne by US Saint-Malo also called US Saint-Servan, which fielded predominantly British players. Stade Rennais adopted the colors of Rennais that comprised black and red with vertical stripes of black in the shirt. Following three seasons of Saint-Malo winning the league Rennes eventually surpassed its rivals in 1908, under the direction by Welsh coach Arthur Griffith. The following year, Rennes won the league again, however in 1910 Rennes did not manage to secure the third time, as Saint-Malo was the winner with two more points. The champions then had a remarkable streak, winning the league the next four seasons.
Following World War I, Rennes started focusing in winning the newly-created Coupe de France. The team was strengthened by the arrival of international players Bernard Lenoble, Maurice Gastiger, Ernest Molles and captain Francois Hugues following the war, during the fourth season of the competition, Rennes made it to the final. The team faced the two-time champions Red Star Olympique, which was led by forward Paul Nicolas, defender Lucien Gamblin and goalkeeper Pierre Chayrigues. Red Star opened the scoring in the 4th minute of the match and the match ended following an injury-time goal by Raymond Sentubery. Following the dissolution from The USFSA during 1913 Rennes was a member of the Ligue de l'Ouest. After 1929 Rennes left the league following a disagreement over the increasing amount of games that the league was planning to introduce in the new year. The move was the cause of Rennes turning into an "free agent" and the club played a number of friendly matches to make up for the loss of league games.
In the month of July, 1930 The National Council of the French Football Federation (FFF) approved 128-20 to support professionalism in French football. Under the direction that of the club's president, Isidore ODORICO, Rennes was among the first clubs to sign the new constitution and later, turned professional and were among the founder members in the league. In the inaugural season of the league, Rennes finished mid-table in its group. In 1935, the club made it to in the semifinals of Coupe de France for the second time. Rennes did lose to Marseille 3-1, in the final after being unable to overcome three goals in the first half. The team's attack was restricted in the game because of the absence of its two top attackmen, Walter Kaiser and Walter Vollweiler both of whom were injured. Rennes continued to play for four years within the top division prior to losing its place to Division 2 during 1937-37. Rennes was a Division 2 player prior to the end of professionalism because of World War II. Following World War II, Rennes went back to Division 1. The team was coached by native Austrian Frenchman Franz Pleyer, Rennes was the club with the best record in the league, finishing 4th in 1948-1949 period. Despite the revival in the domestic scene under Pleyer Rennes struggled to keep the same continuity and, in the 1950s, switched between the first and 2nd division, under guidance of Spaniards Salvador Artigas and Henri Guerin who served in the role of coach-player.
Under the direction of the new President Louis Girard, Rennes underwent an enormous change and renovations were carried out in the club's stadium. Girard wanted to create a system that would make Rennes more competitive in the national arena and his first objective was fulfilled when the team received a promotion into Division 1 in the year 1958. After being in the bottom half of table six straight years, Rennes was now run by ex- player Jean Prouff, finished in fourth position in 1965-64 season. In the same year the club won its first major honor following the winning of the Coupe de France. Rennes were led by players like Daniel Rodighiero, Georges Lamia and Jean-Claude lavaud, beat UA Sedan Torcy 3-1 during their replay in the last. The initial match ended at 2-2 and led to replay. Following the cup's success, Rennes took part for the first time in European tournament for the very first time during the season 1965-66. The club, however was defeated by Czechoslovakian team Dukla Prague in the first round.
The following times, Rennes struggled in league games, but did admirably during competitions like the Coupe de France, reaching semi-finals two times in the year 1967 and 1970. It was in 1971 that Rennes won its third Coupe de France title after losing to Lyon by 1-0, with the sole goal being a penalty conversion from Andre Guy. On the 23rd of May, 1973, Rennes officialy changed the name of its club to reflect its current style. After another year in charge, Prouff departed Rennes and the club went into free-fall. From 1972 until 1994, Rennes was managed by 11 different managers . The club through the years constantly fluctuated between Division 1 and 2. In 1978 the club was at the brink of insolvency and, in the process the club was ordered by a tribunal to dispose of its top earners and follow an austerity policy. The 1980s saw the municipal government of the city acquired a majority stake within the organization.
The year 1994 saw Rennes was relegated in Division 1 and began an era of stability, primarily due to the use of the youth academy of the club. Instead of launching bidding wars to purchase the players they wanted, Rennes groomed its youngsters and then incorporated them into the senior squad once coaches believed they were capable. This method worked well with players like Sylvain Wiltord Jocelyn Gourvennec and Ulrich Le Pen. In 1998 the club was purchased by the municipality to the retail business magnate Francois Pinault. Pinault put a large amount of funds into the club, and sought to boost Rennes' capacity to produce young talent by building an academy that was finished in the year 2000. Pinault also contributed to an entire re-construction project of the stadium. They also made investments into the market for transfer players and enlisted numerous stars who came from South America, most notably Lucas Severino, whom Rennes paid historic EUR21 millions for.
The results were immediately evident in the decade between 2000 and 2010 and saw Rennes playing in UEFA-sanctioned European competitions in five out of the 10 seasons. For youth development Rennes produced a number of young talents, including Yann M'Vila Yacine Brahimi, Jimmy Briand and Abdoulaye Diallo, to name a few. In league play, Rennes tied its best league ever by finishing fourth in the 2004-05 season. The following year the team achieved the same feat once more. The 2009 season saw Rennes made it to the Coupe de France final for the fourth time in the club's history. In the final match, Rennes was up against Breton adversaries Guingamp which was the overwhelming favorite. Even though they led in the second half but Rennes were defeated 2-1 as Guingamp made two scores within a ten minute time period. This year, Rennes reached it to the Coupe de France final once they faced Guingamp. In a highly competitive match, Rennes lost the match to their rivals in a 2-0 loss. The 2017, 2018 Ligue 1 season, Rennes enjoyed one of their most successful seasons in recent times, finishing 5th and qualifying for UEFA Europa League.
In the year 2019, Rennes took home the club's the third Coupe de France win on 27 April. In the final match, Rennes faced Paris St Germain. Paris St Germain, the French Cup winners for the past four seasons were the heavy odds to defeat Rennes having been named Ligue 1 champions for the 2018-19 season on April 21. 8 Rennes recovered from two goals behind to defeat Paris St Germain 6-5 on penalties.
In the 2019-20 season Rennes ended up the third place on the table in Ligue 1 and qualified for 2020-21 UEFA Champions League for the first time in their history.