Otto Addo (born 9 June 1975 in Hamburg, West Germany) is a scout and manager, and a retired Ghanaian-German footballer who played for Ghana internationally. He is currently the assistant manager of Borussia Dortmund.
Addo started his career in 1991 in Hamburg, but failed to make an impression there. He then moved to Hannover 96 in the Regionalliga Nord (third German league). He made a big impression in a squad that featured stars-to-be Gerald Asamoah and Fabian Ernst. That team ripped through the season scoring more than 100 goals, but succumbed to Energie Cottbus in the 1997 promotion playoffs.
In 1998, Hannover finally promoted to the Second Bundesliga. In his first season, he scored seven goals in 30 games and was acknowledged as one of the elite players of the league. He then transferred to Borussia Dortmund in 1999 and played more than 75 times for the team, becoming German champion in 2002. However, he was also hampered by great injury troubles, as he tore his cruciate ligaments three times in this time, the first coming after a German Cup match against SC Freiburg on 15 July 2001. The player had an MRI scan which showed he had torn knee ligaments and underwent surgery on his right knee on 22 July at the Vail, Colorado clinic of world-renowned knee specialist surgeon Dr. Richard Steadman. He healed completely after that, and came back to play the 2002 UEFA Cup Final for Dortmund against Feyenoord Rotterdam on 8 May 2002, which Dortmund lost 3–2 at the Feijenoord Stadion in Rotterdam. On 7 September 2002, Addo tore right knee ligaments for the second time, in a 2004 African Cup of Nations qualifier versus Uganda in Kampala.