Ruger, S&W, and Charter Arms all produce double action revolvers in the U.S., and Colt is said to be about to re-introduce a model or two. All Freedom Arms guns and all current and recent production of United States Firearms (USFA) revolvers are also made in the U.S. but they are all single actions. Dan Wesson no longer has revolvers in production, since their acquisition by CZ.
As an aside to someone's comment above, S&W is owned by Saf-T-Hammer, a U.S. Company founded by a former S&W employee.