Lucien Rault (born 30 March 1936 in Plouguenast) is a French long-distance runner.
He is the current ratified world record holder in the masters M45 5000 metres.
He had an example of longevity from his teammate on the early cross country teams as Olympic gold medalist Alain Mimoun was setting records into his 50s.
He won his first French National Championship at 10000 metres in 1973, at the age of 37.
In 1974 he won the national championship in cross country.