Fabien Lefèvre (born 18 June 1982 in Orléans) is a United States slalom canoeist who has competed since the late 1980s.
Fabien competed for France until 2013 when he became a resident of the United States. Competing in two Summer Olympics, he won two medals in the K-1 event with a silver in 2008 and a bronze in 2004.
Lefèvre also won thirteen medals at the ICF Canoe Slalom World Championships with six golds (K-1: 2002, 2003; C-2 team: 2010, 2011; K-1 team: 2005, 2006), five silvers (C-2: 2010, 2011; K-1: 2005, K-1 team: 2010, 2011), and two bronzes (K-1 team: 2002, K-1: 2011).
He is the overall World Cup champion in K-1 from 2002. He also won two bronze medals at the European Championships in the K-1 team event.