Birgir Örn Birgisson (born 6 October 1969) is an Icelandic basketball coach and a former professional player who played 26 games for the Icelandic national basketball team.
He won two national championships with Keflavík in 1997 and 1999.
Before turning to basketball, Birgir had a successful career in swimming and was a member of the Icelandic national swimming team.