Satyrus of Callatis was a Hellenistic historian and biographer of the 3rd century BCE from the city of Callatis, a Dorian colony on the Black Sea. He is often called "Satyrus the Peripatetic," an epithet likely reflecting the anecdotal style of his writing rather than a confirmed philosophical affiliation, and he appears to have been active in Ptolemaic Alexandria. The Suda identifies him as a philologist.

His major work was the Lives, a multi-volume collection of biographies. It survives only in fragments, primarily preserved by later authors like Athenaeus and Diogenes Laërtius. The most significant extant portion is his Life of Euripides, recovered from a papyrus roll. Other biographical subjects included Demosthenes, Dionysius I of Syracuse, and Sophocles.

Satyrus is a pivotal figure in the development of ancient biography. His method employed a distinctive, sometimes dialogic, narrative focused on character portrayal through anecdote, influencing later writers like Plutarch. The papyrus fragment of his Life of Euripides provides a crucial primary source for understanding early Hellenistic biographical technique, and his fragments remain valuable for their preserved historical and literary details.