Dick Dastardly is a fictional character who has appeared in various animated series by Hanna-Barbera Productions from 1968 onward. Dastardly's most famous appearances are in the series Wacky Races (his initial appearance) and its spin-off, Dastardly and Muttley in Their Flying Machines. He is partly based on the English actor Terry-Thomas.

The character was originally voiced by Paul Winchell, using a characterization that Winchell would also employ several years later to voice the Smurfs' nemesis Gargamel. Winchell's facial structures were caricatured in the related character design as well. In a live action version played by British actor Porter Flynn a prosthetic nose and chin were employed to replicate Dastardly's exaggerated features from the original cartoon.

In subsequent depictions of the character, Dick Dastardly was voiced by Rob Paulsen and by Jim Cummings (the latter of whom was notable for voicing other characters previously voiced by Winchell, including Tigger and Zummi Gummi).

Dastardly's catchphrases in the cartoons were "Muttley, do something!", "Drat, and double drat!" and occasionally "Triple drat!" or "Curses, foiled again!", otherwise.