Athenagoras (c.133 - c.190 AD) was a Father of the Church, an Ante-Nicene Christian apologist who lived during the second half of the 2nd century of whom little is known for certain, besides that he was Athenian (though possibly not originally from Athens), a philosopher, and a convert to Christianity. In his writings he styles himself as "Athenagoras, the Athenian, Philosopher, and Christian". There is some evidence that he was a Platonist before his conversion.

Athenagoras' feast day is observed on 24 July in the Eastern Orthodox Church.