Satyrus is the name of a number of figures from the ancient world.

Satyrus was a political figure at Athens in the late 5th century BC. Xenophon mentions him in his Hellenica: "When Critias had spoken these words, Satyrus dragged Theramenes away from the altar, and his servants lent their aid."

Satyrus was a distinguished comic actor at Athens in the 4th century BC, who is said to have instructed the orator and politician Demosthenes in the art of rhetoric.

Satyrus, known as Satyrus the Peripatetic, was a Greek writer of the late 3rd century BC. He is best known as the author of a biography of the Athenian dramatist Euripides. A near-complete copy of this work was found at Oxyrhynchus in Egypt. He also wrote a biography of Philip of Macedon, of which parts survive.

Satyrus of Elis won the Olympic prize for boxing three times in the 320s BC, according to Pausanias.

Satyrus was the name of two early Christian saints.

St Satyrus, in Christian mythology, was from Arabia and was put to death, traditionally in Carthage in the early 3rd century AD, for destroying a pagan idol in a miraculous fashion. He is not now considered a historical figure.

St Satyrus of Milan was the confessor and brother of Saints Ambrose and Marcellina. He was born at Trier, Germany, moved to Rome with his family and was subsequently trained as a lawyer. Appointed prefect to one of the Roman provinces, he resigned his post when Ambrose became Archbishop of Milan in order to assume administration of the secular affairs of the archdiocese. He died unexpectedly at Milan in 376 and was eulogised by his brother with the funeral sermon, On the Death of a Brother.