Billie Hayes was an American actress.

Hayes is best known for her role as Wilhelmina W. Witchiepoo on Sid and Marty Krofft's live action children's classics H.R. Pufnstuf and Lidsville, and the film Pufnstuf (1970).

She first appeared on the big screen in Li'l Abner (1959), before moving primarily into television and guest starring in a number of series including Bewitched, The Monkees, Donny and Marie, Wonderbug, Tabitha, Trapper John M.D., Murder, She Wrote, and General Hospital.

Hayes was also a prolific voice actor, contributing to the animated series Transformers: Rescue Bots, Teen Titans Go!, The Batman, Teen Titans, The Powerpuff Girls, Johnny Bravo, Rugrats, The Brothers Flub, Aaah!!! Real Monsters, Darkwing Duck, TaleSpin, Paw Paws, and The Real Ghostbusters.

On the big screen, she lent her voice to The Black Cauldron (1985), The Nightmare Before Christmas (1993), and Shrek Forever After (2010).

Hayes died April 29, 2021, in Los Angeles, California. She was 96.