Marcus Porcius Cato can refer to:

• Cato the Elder (consul 195 BC; called "Censorinus"), politician renowned for austerity and author
• Cato the Younger (praetor 54 BC; called "Uticensis"), opponent of Caesar
• Marcus Porcius Cato (consul 118 BC)
• Marcus Porcius Cato (consul 36)
• Marcus Porcius Cato (father of Cato the Younger)
• Marcus Porcius Cato (son of Cato the Younger)
• Marcus Porcius Cato Licinianus (praetor 152 BC)
• Marcus Porcius Cato Salonianus (praetor c. 113 BC)