When Dinosaurs Roamed America is a two-hour American television program that first aired on Discovery Channel in 2001. It was directed by Pierre de Lespinois and narrated by actor John Goodman. The dinosaurs were designed by Paleo-artist and art director Mark Dubeau, who is also noted for creating dinosaurs on a myriad of other Discovery Channel and National Geographic specials. The dinosaur animation was directed by noted animator Don Waller at Meteor Studios, in Montreal, Canada. The music was composed by Christopher Franke.

When Dinosaurs Roamed America premiered to 5 million viewers.