Oxford Harlequins RFC was formed in 1996 following the merger of Oxford Marathons RFC and Oxford Old Boys RFC. In 2018 Oxford Harlequins moved from Marston Ferry Road to Horspath Sports Ground following the grant of a 30-year lease on the ground from
Oxford City Council and the decision by the RFU to invest over £750,000 to build a new floodlit artificial turf rugby pitch at the new site. Following the appointment of Pete Davies in 2019, the men's 1st XV achieved its highest league finish since the 2015–16 season before the season was curtailed by the national lockdowns of March 2020. Pete Davies was appointed as men's head coach in August 2019. The 2020–21 season was cancelled due to the Covid Pandemic and subsequent lockdowns and in July 2021 Oxford Harlequins adopted a new brand and logo, dropping the "Harlequins" in favour of "Quins" and replacing the logo with a more modern design. In May 2021, the club launched the inaugural Lord Mayor's Festival of Rugby in collaboration with Oxford City Council. The festival raised money for the Lord Mayor's charities and introduced an event where teams compete for the Lord Mayor's Men's Cup, Plate and Bowl, Women's Cup and Under 18 Boys' Cup. Following the success of the inaugural festival it became an annual event. The 2021–22 season was a record-breaking season for Oxford Quins men's 1st XV, in which the team, under co-captains Allan Purchase & Nick Marshall, won 25 out of 26 league matches, scored 1046 points, amassed 20 try bonus points, and despite starting their campaign with a -5 points deduction, still managed to win the league and, as league champions, were awarded promotion to tier 5 of the England Rugby Club Championship. Oxford Quins Men's 1st XV spent one season (2022–2023) in Regional 1 London & South East and achieved a top four finish and being moved to Regional 1 Midlands for the 2023–24 season. By Sept 2022 Oxford Quins men's section had sufficient playing numbers to relaunch a Men's 3rd XV in Berkshire Buckinghamshire Oxfordshire (BBO) 3 North, tier 10 of the RFU Club Championship. Led by their captain, Henry Folds, and former Oxford Quins Director of Rugby Alan Hancock, the Oxford Quins became league champions and won promotion to tier 9 of the RFU Club Championship. In the 2022–23 season the 3rd XV achieved a second successive league win and were promoted to Level 8 of the RFU Rugby Pyramid, Counties 1. The 2023–24 league campaign was a two-horse race between Oxford Quins and Stourbridge as both clubs opened a gap between themselves and the rest, by Christmas, Quins had beaten Stourbridge away and only dropped one match opening up a 5-point lead. On 6 January 2024, Quins beat Stourbridge at home 18-13 and remained 10 points clear until 16 March 2024, where a 7–54 away win at Banbury resulted in Oxford Quins winning the league with two rounds left and they were promoted to the National Leagues for the 2024–25 season. == The Brookes– Quins partnership ==