Sebastian Lander (born 11 March 1991) is a Danish professional road bicycle racer and track cyclist, who last rode for UCI Continental team Riwal CeramicSpeed. In 2012, Lander won the Danish National Road Race Championships.

Lander raced at the UCI Continental level for Glud & Marstrand–LRØ in the 2008, 2009 and 2012 seasons, and for Concordia Forsikring–Himmerland in the 2010 and 2011 seasons. He joined the World Tour team BMC Racing Team for the 2013 and 2014 seasons, riding in the 2013 Vuelta a España.

He returned to the Continental level for the 2015 season with Team TreFor–Blue Water, but signed for ONE Pro Cycling for the 2016 season, at which they raced at Pro Continental level.