In addition to Osterøy IL, 72 other teams from 3 different countries played in Girls 14 - born 2004 - 11 aside. They were divided into 18 different groups, whereof Osterøy IL could be found in Group 12 together with Haugar, SK, Gjøvik-Lyn, FK and Træff.

Osterøy IL made it to Playoff B after reaching 3:rd place in Group 12. Once in the playoff they made it all the way to the Final, but lost it against Træff with 0-1. Thereby Osterøy IL finished second in G14 Playoff B during Norway Cup 2018.