Ammonius

{{For|the lunar crater|Ammonius (crater)}}

Ammonius is a masculine given name which may refer to:

• Ammonius Lithotomos (3rd century BC), Alexandrian Greek lithotomist
• Ammonius of Alexandria, ancient Olympic athlete who won the stadion race in the 131st Olympiad in 256 BCE
• Ammonius of Alexandria, ancient grammarian
• Ammonius of Athens (1st century AD), philosopher and teacher of Plutarch
• Ammonius Saccas (3rd century AD), Alexandrian Neoplatonist philosopher and teacher of Plotinus
• Ammonius of Alexandria (Christian philosopher) (3rd century AD), Christian writer confused with Ammonius Saccas
• Ammonius the Hermit, called Saint Amun, 4th century abbot and desert father
• Ammonius Grammaticus ({{fl.|389}}), Egyptian priest from Alexandria, supposed author of a grammatical treatise
• Ammonius Hermiae (5th century AD), Alexandrian philosopher
• Ammonius (Alexandrian monk) ({{circa}} 5th century AD)

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