Kristján Örn Sigurðsson (born 7 October 1980 in Akureyri) is an Icelandic footballer who played as a defender.

He started his career at his local club ÍF Völsungur Húsavik, and moved to Stoke City in England as a teenager.

Failing to grab a place on the first team, he returned to Iceland to play for KR.

He showed acceptable defensive skills, but clear weaknesses in his passing game and general offensive play from his right back position.

Kristján showed great speed, being tested as the fastest Brann player in the 40 metre dash before the 2006 season.