Bo Markus Karlsson (born 30 August 1972) is a Swedish football player who plays for IFK Lidingö FK in the Swedish Division 4.
He retired from football in 2009, but will play for IFK Lidingö during the season 2013.
Karlsson joined Djurgården from BKV Norrtälje for the 1996 season as a midfielder.
He was captain of the very successful Djurgården squad that won back-to-back Swedish championships in 2002 and 2003, including the league-cup double in 2002.He later played for Rot-Weiß Essen, Stabæk Fotball, IF Brommapojkarna and IFK Lidingö FK.