Remigijus Lupeikis (born 22 September 1968) is a Lithuanian former track and road racing cyclist. Initially competing for the Soviet Union prior to its breakup, he had a long career riding for Lithuania, which included competing in both road and track events at the 1996 Summer Olympics, and in the road race at the 2000 Summer Olympics.

Born in Klaipėda, Lupeikis was never selected to race in the Tour de France, but he did compete at the Vuelta a España in 1992 and 1997 as well as the Giro d'Italia in 1992. He won the Tour de Berlin in 1994. In 1995 he won a silver medal in the Men's points race at the 1995 UCI Track Cycling World Championships in Colombia. He won Lithuanian Sportsman of the Year that same year. He won the Tour d'Egypte in 2000. Also in 2000, he was Lithuanian champion in the individual time trial. He retired from cycling in 2002, after becoming Lithuanian champion in the road race.