William Dwight Schultz (born November 24, 1947) is an American television, film and voice actor.

He is known for his roles as Captain H. M. "Howling Mad" Murdock on the 1980s action series The A-Team and as Reginald Barclay in Star Trek: The Next Generation, Star Trek: Voyager and Star Trek: First Contact.

He is also known in animation as the megalomaniacal mad scientist Dr. Animo in the Ben 10 series, Adrian Toomes/Vulture in several Marvel video games, Chef Mung Daal in the children's animated series Chowder and Eddie the Squirrel in CatDog.

He played Dr. Leviticus Mitchell in the revival series episode "If These Walls Could Talk". Archive footage of this appearance was later used in the clip show "The Voice of Reason".