2018–19 Isthmian League
The 2018–19 season is the 104th season of the Isthmian League, which is an English football competition featuring semi-professional and amateur clubs from London, East and South East England. This is also the first season to consist of four divisions after the league reorganised the former South Division into the new South Central and South East divisions. The league is also known as the Bostik League under a sponsorship deal with Bostik. Promoted from the North Division Premier Division. Team changes. Promoted from the South Division Transferred from the Southern League Premier Division Relegated from the  National League South Promoted to the National League South Transferred to the Southern League Central Division Transferred to the Southern League South Division Relegated to the South Central Division Resigned from the league League table. <onlyinclude></onlyinclude> Promoted from the Eastern Counties League North Division. Team changes. Promoted from the Essex Senior League Promoted to the Premier Division Relegated to the Eastern Counties League Transferred to the South Central Division League table. <onlyinclude></onlyinclude> South Central Division. Team changes. The following teams were allocated to the South Central Division: Promoted from the Combined Counties League Promoted from the  Essex Senior League Promoted from the Hellenic League Relegated from the Premier Division Remained from the South Division Transferred from the North Division Transferred from the Southern League Division One East League table. <onlyinclude></onlyinclude> South East Division. Team changes. The 16 teams from the preceding season's South Division remained in the South East Division. They were joined by the following: Promoted from the Southern Combination League Promoted from the Southern Counties East League League table. <onlyinclude></onlyinclude> League Cup. The 2018–19 Alan Turvey Trophy (formerly the Isthmian League Cup) was the 45th season of the Alan  Turvey Trophy, the cup competition of the whole Isthmian League. Calendar. The Isthmian League Cup was voluntary this season. Five clubs decided not to take part in the competition: Preliminary round. Twenty-six clubs participated in the Preliminary round, while fifty-one clubs received a bye to the First round. First round. Thirteen clubs to have made it through the Preliminary round were entered into the draw with fifty-one clubs who get a bye, making sixty-four clubs.