Colbert has been promoting the trip on Comedy Central's "The Colbert Report," but because the military urged caution, he's only trumpeted a vague trip to the Persian Gulf.
The shows will be taped in front of an audience of about 450 troops. They will air Monday through Thursday next week. It's the first time anyone has broadcast from Iraq from a tour intended to entertain U.S. troops.
Colbert says he was spurred to make the trip when he noticed economic news coverage eclipsing reports from Baghdad.
He says he feels a responsibility to keep U.S. soldiers' story alive because he's often joked about the Iraq War on his show.