Janet Marie Waldo (1920–2016) was an American voice actress, working primarily for Hanna-Barbera.
Notable voice roles:
- Judy Jetson on The Jetsons
- Jenny Trent on The Cattanooga Cats, segment Around the World in 79 Days
- Penelope Pitstop on Wacky Races and The Perils of Penelope Pitstop
- Josie McCoy on Josie and the Pussycats
- Hogatha on The Smurfs