Geoff Pierson is an American actor known for his starring television roles on Dexter, Unhappily Ever After, Grace Under Fire, 24, Ryan's Hope, and Designated Survivor.

Pierson appeared with George C. Scott on Broadway in Tricks Of The Trade, before continuing on to do several New York soap operas and many regional theater plays.

Pierson's first high-profile prime-time television role was as Jack Malloy, the head of a dysfunctional family, in The WB sitcom Unhappily Ever After, which was created by Ron Leavitt, one of the creators of FOX's Married... with Children.

In 2011, Pierson played Midas Mulligan in Atlas Shrugged, based on Ayn Rand's novel of the same name.

He played Russell Dunbar's wealthy father in Rules of Engagement and he had a recurring role as the mysterious Mr. Smith on Castle.