Lucjan Roman Lis (born 8 August 1950) is a retired Polish cyclist. He had his best achievements in the 100 km team time trial. In this event he won a silver medal at the 1972 Summer Olympics as well as a bronze and a gold medal at the world championships in 1971 and 1973, respectively. He was less successful in the individual road race, finishing in 36th place at the 1972 Olympics. In 1973 he won the Tour de Pologne individually and the Peace Race with the Polish team.

Lis grew up in a small neighborhood of a coal mine at Bytom and has a degree in mining. He started training in cycling following his elder brother Marian. In 1971 he had a serious injury of the achilles tendon that almost ended his career, but he recovered. He retired from competitions in 1975 and later had serious kidney problems. He married Barbara Lis, a nurse. They have two daughters, Laura and Romana, and a son Lucas, a competitive German cyclist. They liveed in Germany.