In 1977 Egham joined Division Two of the Isthmian League. Restructuring saw them moved to Division One South in 1984, before Division Two was restored in 1991. They were relegated to Division Three at the end of the 1997–98 season and remained there until restructuring saw them placed in Division One South in 2002. The club were transferred to Division One West of the Southern League for the 2004–05 season, but were moved back to Division Two of the Isthmian League the following season. In 2006 the club left the Isthmian League and joined the Premier Division of the Combined Counties League. They were Premier Division champions in 2012–13, earning promotion to Division One Central of the Southern League. A third-place finish in 2015–16 saw them qualify for the promotion play-offs, in which they were beaten 4–2 on penalties in the semi-finals by St Ives Town after a 2–2 draw. The following season saw the club finish fifth, qualifying for the play-offs again and they went on to lose 4–0 to Farnborough in the semi-finals.