Marc, or MARC, may refer to or stand for one of the following:

• The lower-case word marc is a French style of pomace brandy.
• The capitalized word Marc is a men's first name, primarily French in origin (such as the painter Marc Chagall).
• MARC, in all upper case, is a computer mailing list archive.
• MARC, in all upper case, is the common name for the commuter rail system located in Maryland, in the United States.
• MARC, in all upper case, is the set of rules used by libraries for establishing a computer-based catalog; it is also referred to as the MARC standards.