Saint Alexander of Comana (Greek: Ἀλέξανδρος Κομάνων); died c. 251, known as Alexander Carbonarius (Greek: Ἀλέξανδρος ὁ Ἀνθρακεὺς), meaning "the charcoal burner", was Bishop of Comana in Pontus.

The saint's curious name comes from the fact that he had, out of humility, taken up the work of burning charcoal, so as to escape worldly honors.

St. Gregory Thaumaturgus had been asked to come to Comana to help select a bishop for that place.

As he rejected all the candidates someone suggested derisively that he might accept Alexander, the charcoal-burner.

Gregory took the suggestion seriously, summoned Alexander, and found that he had to do with a saintly man of great capabilities.