In addition to Kungälvs HK, 14 other teams from 5 different countries do play in Girls 21. They are divided into 2 different groups, whereof Kungälvs HK can be found in Group 1 together with TV Uelzen, HSG Juniorinnen Nordwest, Lugi HF, Torslanda HK 1, Särökometernas HK and Knack Handbalteam Roeselare Roeselare. Kungälvs HK also participated in Girls 21 during Partille Cup 2023. They reached the Semi final in G21 A-Play-off, but lost it against Kärra HF with 8-18.