Christian Ahlmann (born December 17, 1974 in Marl, North Rhine-Westphalia) is a German equestrian who competes in the sport of show jumping. He ranks first in the FEI Longines World Ranking List.
Ahlmann won the FEI Show Jumping World Cup with Taloubet Z in 2011. In 2014, he was the CHIO Aachenwinner. He has won several medals with the German team at European Championships, World Championships and Olympic Games since 2003. Christian Ahlmann has been seen as an exceptional talent from an early age, being one of the youngest riders ever to receive the "goldenes Reitabzeichen", at age 14, and is today considered a calm, fine rider with a soft hand.
During the 2008 Summer Olympics, Ahlmann's horse tested positive for the banned substance capsaicin along with the horses of three other riders, and was subsequently suspended from the Games. Because of the doping charge, the German Olympic Sports Confederation sent a bill to Ahlmann for his travel and accommodation costs at the Games. As a result of the doping offence, he was struck off the German 'A-Kader' list of elite riders for two years
and returned to the German team in 2011.