Marc Halsey is an American actor, best known for his theatre work.

Theatre credits include Clitandre in The Learned Ladies (Gallery Playhouse); Matt in Pen and Leather Apron/Currier in 1776 (Guthrie Theater); Cheshire Cat/White Knight/Others in Lookingglass Alice (Arden Theatre); Trebonius/Others in Julius Caesar, Gregory in Romeo and Juliet, Waiter in The Matchmaker, andServant in Measure for Measure (American Players Theatre); and Orpheus in Eurydice (Ten Thousand Things Theater).