Modestus is a Roman cognomen and a masculine name. It may refer to:
Ancient Romans Julius Modestus (1st century BC), Roman freedman and grammarian Marcus Mettius Modestus (procurator) (1st century AD), Roman governor of Egypt Aufidius Modestus (1st century AD), Roman philologist, commentator on Horace Mettius Modestus, Roman consul AD 82 Gaius Trebonius Proculus Mettius Modestus (2nd century), Roman senator Modestus (apologete) (2nd century), Christian apologist who wrote against Marcion Quintus Aiacius Modestus Crescentianus, consul alongside Marcus Pomponius Maecius Probus in 228 Domitius Modestus (fl. 358–377), Roman politician Gaius Sollius Modestus Sidonius Apollinaris (5th century), Roman poet and diplomat Modestus or Pseudo-Modestus (9th century?), supposed author of the Libellus de vocabulis rei militaris
Saints Saint Modestus (it), legendary saint and educator of Saint Vitus, martyr under Diocletian (c. 304) Modestus, martyr at Agde alongside Saint Tiberius during the Diocletianic persecution Modestus (bishop of Trier) (died 489), saint Modestus of Jerusalem (died 630), Christian patriarch of Jerusalem Modestus of Carantania (c. 720–before 772), Irish missionary to the Carantanians and saint
Modern world Modestus Yao Z. Ahiable (born 1948), Ghanaian politician Modestus Atshipara (born 1966), Namibian politician Modestus Kilufi (born 1959), Tanzanian politician Modestus Setiawan (born 1982), Indonesian footballer
See also Modestinus (died 311), Christian martyr and saint Saint Modesta, female saint