Østerbro Idræts Forening was one of 109 clubs from Denmark that had teams playing during Kronborg Cup 2023. They participated with three teams in Boys 2012 B, Boys 2012 C and Girls 2012 B respectively. The team in Boys 2012 B made it to the the Bronze match in Playoff A, but lost it against IF Leikin Svart by 0-1.

In addition to this, Østerbro Idræts Forening have participated in Kronborg Cup before. During Kronborg Cup 2022, Østerbro Idræts Forening had 7 teams playing in Boys 2013 A, Boys 2013 C, Boys 2011 A, Boys 2011 C, Boys 2010 B, Boys 2010 C and Boys 2008 C respectively. The team in Boys 2011 A made it to the the Bronze match in Playoff Aand won it over Lyngby Boldklub 1921 by 2-1.

Østerbro Idræts Forening comes from København Ø which lies approximately 38 km from Helsingør, where Kronborg Cup takes place. The area around København Ø does also provide 103 additional clubs participating during Kronborg Cup 2023 (Among others: Ålholm IF, Vestegnens bold akademi, Jyllinge FC, Borstahusens BK, Boldklubben 1908, FIF, Hillerød, BK Vestia, Herlev IF, Kastrup Boldklub and Havdrup GI).