Susan Blu (born Susan Maria Blupka, 12 July 1948, St. Paul, Minnesota) is an American voice actress and director. She has also been the voice director for a number of animated series such as Clifford the Big Red Dog. Her roles for Hanna-Barbera include:
- Flim-Flam in The 13 Ghosts of Scooby-Doo
- Princess Paw Paw in Paw Paws
- Jazz in Star Fairies
- Dreamchip Gemstone in The Flintstone Kids
- Snulu in Yogi and the Invasion of the Space Bears
- Sibella in Scooby-Doo and the Ghoul School
In Yogi's Great Escape, Blu did voices for Buzzy the girl bear cub and three unnamed blonde human girls.