The name Donatus can refer to the following people:

• Aelius Donatus, a Roman grammarian and teacher of rhetoric
• Donatus Magnus, a (4th century CE) bishop of Carthage who founded the heretic Donatist sect
• The monk Donatus (5th century CE) who left Roman Africa during one of the Vandal persecutions and established monastic life in Valencia, Spain.
• Saint Donatus of Fiesole, an Irish monk who became bishop of Fiesole in 824
• Saint Donatus of Libya
• Saint Donatius of Thmuis, martyr and successor of the also martyrised St. Phileas as bishop of Thmuis, a city of Lower Egypt in the Roman province Augustamnica Prima, suffragan of Pelusium
• Saint Donatus, a Christian martyr of Sicily. See Saint Placidus (martyr).

It can also refer to the following locations;

• Saint Donatus, Iowa, a community located in Jackson County, Iowa.
• Saint Donatus Catholic Church - A parish of the Roman Catholic Church located in Saint Donatus, Iowa.

Donat