Pachomius the Serb (Russian: Пахомий Серб, Serbian: Пахомије Србин), also known as Pachomius Logothetes, Russian: Пахомий Логофет, Greek: Παχώμιος Λογοθέτης) was a 15th-century Serbian hagiographer who, after taking monastic vows, was schooled on Mount Athos and mastered the ornate style of medieval Serbian literature. He is credited by the Russian Early Texts Society for the Serbian version of Barlaam and Josaphat from Old Greek.