Auctor may refer to:
An author of a work, who is proficient in the subject matter A scientist who first describes a species or other taxon The seller at an auction Auctor Corporation, trade name for ACC Microelectronics, a defunct American semiconductor company Octroi (), a local tax Saint Auctor (c. 451), a bishop of Metz
See also Auctoritas Auctorum Instigator (disambiguation)