Blue / White /
In addition to IFK Lidingö FK, 221 other teams from 31 different countries played in Boys 15. They were divided into 55 different groups, whereof IFK Lidingö FK could be found in Group 21 together with Ordin FC, Regents Park FC and Kullavik IF. IFK Lidingö FK continued to Play off A after reaching 1:st place in Group 21. In the playoff they made it to Semi final, but lost it against IFK Haninge with 4-5. In the Final, Stjarnan 1 won over IFK Haninge and became the winner of Play off A in Boys 15. IFK Lidingö FK also participated in Boys 14 during Gothia Cup 2018. They reached the 1/64 Final in B14 Play off B, but lost it against City Football Schools AD with 1-4.