In 1951 Marlow returned to the Spartan League's Premier Division, where they remained until joining Division Two of the Athenian League in 1965. The club were promoted to Division One after finishing third in the division in 1970–71. When the Athenian League was disbanded in 1984, they joined Division Two North of the Isthmian League. The club were transferred to Division Two South the following season, and in 1986–87 they finished second and were promoted to Division One. The following season saw them win the Division One title, earning promotion to the Premier Division. In 1991–92 the club reached the first round of the FA Cup for the first time since 1892, but lost 6–0 to West Bromwich Albion.