Marcus Licinius Crassus Frugi (flourished 1st century AD) was a Roman nobleman of consular rank who lived during the Roman Empire. Frugi's mother was an unnamed Roman woman, while his father was consul and governor Marcus Licinius Crassus Frugi. Frugi's adoptive paternal grandfather was consul and general Marcus Licinius Crassus the Younger. Crassus was the grandson of triumvir Marcus Licinius Crassus and the last known direct descendant of his grandfather. He had a daughter called Licinia who married the consul Lucius Calpurnius Piso; their son, Gaius Calpurnius Piso, was a conspirator against the Emperor Nero.