Since the days of silent films and comic strips there have been dogs depicted in the cartoons.  There are so many of them that it will be impossible to list them all here.  The most popular and legendary ones have fans the world over.

Such popular Hanna Barbera cartoon dogs would include Huckleberry Hound.  An anthropomorphic dog with blue fur wearing a top hat and tie.  He would have slapstick adventures that were spectacular to watch and thanks to hi res and Blu Ray this cartoon look astonishing to this day.  He had a southern drawl and would talk to the viewer explaining his feelings.  Mutley was a short shaggy haired dog that had a trademark snicker.  He was the confidant of Dick Dastardly.  He would take place in Dastardly's nefarious schemes and would snicker when Dastardly's doings would fall back on him.  Mutley is world famous and beloved by untold millions.  In the early days of the 1940s, Bill Hannah and Joe Barbera at MGM introduced Droopy, a beagle that is considered one of the funniest cartoon characters of all time.  Droopy's animated shorts are award winning legendary works that are high standards to this day.  Hanna Barbera would stick a dog in any cartoon they could.  Fans have their favorites such as Astro, the futuristic dog seen on the popular animated cartoon The Jetsons.  Astro was actually the progenitor of Scooby Doo, both being voiced by Daws Butler and having the same speech patterns and flaws.  There are more HB cartoon dogs like Augie Doggie and Doggie Daddy the father and son team of canines that is considered great family fare.

The superhero market got its own cartoon dog in the guise of none other than Underdog.  An anthropomorphic dog in red tights and blue cape.  His girlfriend is Sweet Polly Purebred ace reporter. Underdog hit the scene in the early 1960s and became so popular he had his own balloons and floats in the Macy's Thanksgiving Day Parade for years. 

Disney introduced Pluto in a 1930 short called The Picnic.  Actually Pluto was Minnie Mouse's dog not Mickey Mouse's that most associate him with.  A loyal dog, Pluto gets into mischief as he tries to solve problems or ends up in conflicts with villains and more.  He's been featured in classic and contemporary Disney features, shorts, television shows, and movies.  He is part of the juggernaut Disney merchandising team and is probably one of the most recognized cartoon dogs ever. It doesn't stop there with Pluto.

The 80s, 90s, and 00s have brought us many more cartoon dogs like Santa's Little Helper from The Simpsons who probably holds the world's record for more screen time than any other cartoon dog. The Simpsons has been on television for over 20 years now and just about each episode has Santa's Little Helper show up.  There is Odie from the Heathcliff comic strip and animated cartoons.  He's become a star in his own right. 

Disney's Goofy is a dog but he's so anthropomorphic he's sort of a not-dog.  We had to name him anyway.