Forest Green finished as runners-up in 1924–25 and 1925–26, before rejoining the Gloucestershire Northern Senior League in 1926. They went on to finish as runners-up in 1926–27 before leaving the league again to play in the new Stroud Premier League. After finishing fourth in the league, the club returned to the Northern Senior League at the end of the season, although they also kept a team in the Stroud Premier League. The club withdrew from the Stroud Premier League in 1930, the league for a third time in 1934, rejoining the Stroud Premier League. They were Stroud Premier League champions for three successive seasons in 1934–35, 1935–36 and 1936–37, before re-entering the Northern Senior League in 1937. They went on to win the league title in 1937–38. After finishing as runners-up in 1948–49, they won successive league titles in 1949–50 and 1950–51. Although the club finished as runners-up in 1952–53, they were relegated to Division Two at the end of the 1954–55 season. However, they were Division Two champions the following season, and were promoted back to Division One. Forest Green were amongst the founders of the Gloucestershire County League in 1968, where they played until moving up to the Premier Division of the Hellenic League in 1975 under the management of Peter Goring.