The 2015–16 season was a busy season for Risborough Rangers. They competed in the FA Cup for the first time in their history winning 3–0 at Ampthill Town before going out 3–0 to Southern League side Aylesbury FC at 'Windsors' in front of a crowd of 450. In the FA Vase Rangers travelled to United Counties League side Irchester Utd, winning 4–0, before losing away to Cricklewood Wanderers 1–0 in the next round. Former Thame United, Chalfont St. Peter FC and Risborough Rangers player Jamie Rayner was appointed as joint first team manager alongside Bob Rayner at the start of the season, following a spell as joint assistant manager alongside long serving Nick Young. On a managerial level, Jamie had previously worked as Risborough Rangers Reserve team manager, where he guided them to promotion in his first season, only losing one league game. Rangers finished 7th in SSML Division One with top scorer Martin Griggs topping the division's goal-scoring chart with 35 goals from 33 matches. Risborough finished the season winning the Berks & Bucks FA Intermediate Cup beating Olney Town 2–1 AET in the final at Newport Pagnell Town. At the end of the 2015–16 season Bob Rayner retired from football management having managed Rangers for 15 seasons in total, handing over the reins to son Jamie and his assistant Nick Young.