Marcus Tullius Cicero was an orator and statesman of Ancient Rome, and is generally considered the greatest Latin prose stylist. He had a younger brother Quintus Tullius Cicero, who served in government and was an author.

Cicero also the name of some places in the United States of America, probably named for the Roman orator:

• Cicero, Illinois
• Cicero, Indiana
• Cicero, New York

Cicero was also the code name of Elyesa Bazna, a German spy during World War II.

Cicero was also the name of the racehorse owned by Archibald Philip Primrose, 5th Earl of Rosebery, which won the Epsom Derby in 1905.