Roar Ljøkelsøy (born 31 May 1976) is a Norwegian former ski jumper who competed from 1993 to 2010, and twice finished runner up in the World Cup.

He won his first individual World Cup event on 25 January 2003 and was a very consistent competitor in the 2003/04 and 2004/05 seasons, finishing runner-up in both.

In 2003–04 he won seven out of the last eleven competitions, finishing ten points short of eventual winner Janne Ahonen.

In 2006, he retained his Ski Flying World Championship in Kulm, winning with over twenty points to the next competitor, despite feeling ill.

Ljøkelsøy retired from the sport after competing in the 2010 Ski Flying World Championships in Planica, with his last official jump being 193.5 metres.