Augustinus or Augustine of Hippo (354–430) was a Christian theologian.

Augustinus may also refer to:

• Augustinus (Jansenist book), book on the writings of Augustine of Hippo
• 17496 Augustinus, a main-belt asteroid
• Augustinus Hibernicus or Augustine Eriugena (fl. 655), Irish writer and philosopher
• Augustinus Triumphus (1243–1328), hermit and writer

• Antonius Augustinus or Antonio Agustín (1516–1586), Humanist scholar and jurist
• Norm Augustinus, American satire writer, comedian and comic artist

• Augustine (disambiguation)
• Callophrys augustinus, the brown elfin, a species of butterfly
• Saint Augustine (disambiguation)

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