Cato the Elder or "the Censor" (Marcus Porcius Cato 234BC–149BC), Roman statesman

Cato, 18th century drama by Joseph Addison, based on the life of Cato the Younger

Cato the Younger "Cato of Utica" or "Cato Minor" (Marcus Porcius Catō Uticēnsis 95BC–46BC), politician and statesman in the late Roman Republic, remembered for his lengthy conflict with Gaius Julius Caesar, and moral integrity

Cato Institute, American libertarian think tank

Lucius Porcius Cato, son of Cato Salonianus, consul 89 BC, killed during the Social War (91–88 BC)

CATO, an acronym for Catapult Assisted take off

Marcus Porcius Cato Licinianus, son of Cato the Elder by his first wife Licinia, jurist

Cato, the pseudonym for the authors of the 1940s novel Guilty Men; Michael Foot, Frank Owen, Peter Howard

Cato, a South Devon Railway Eagle class 4-4-0ST steam locomotive

Distichs of Cato or simply Cato, a medieval Latin-language schoolbook & moral guide

Kelvin Cato (born 1974), American basketball player

Diomedes Cato (born 1560, died 1618) was a Polish composer

Marcus Porcius Cato (II), son of Cato the Younger, fell at the Battle of Philippi, 42 BC

Cato Township, Michigan

Marcus Porcius Cato Salonianus, son of Cato the Elder by his second wife Salonia, (born 154 BC, when his father had completed his eightieth year)

Cato's Letters, a series of libertarian essays written in the 1720s

Corazón Artificial Total Ortotópico (Spanish for Orthotopic Total Artificial Heart) invented by Dr. Juan Giambruno

Catto is a surname, and may refer to: Henry E. Catto, Jr., American businessman and ambassador Jamie Catto, British singer/songwriter Jeremy Catto, British historian Octavius Catto, American civil rights advocate and black baseball organizer Stephen...

Gaius Porcius Cato, son of Cato Licinianus, consul 114 BC

Suzy Cato (born 1968), New Zealand entertainer

Cato the anti-Federalist, pseudonym for an American author of anti-Federalist articles in the late 1780s, probably the politician George Clinton

Cato Zahl Pedersen, norwegian disabled sportsman who is going to climb Mount Everest in May/June 2007 without arms

Cato (ship) was an English ship sunk on the Great Barrier Reef in 1803.