Bolivar is a fictional character, Donald Duck's dog. He first appeared in the Mickey Mouse cartoon Alpine Climbers where he and Pluto rescued Mickey and Donald from an eagle and a mountain goat. Later on he appeared in the newspaper comic strips as Donald's dog. Ever since 1938 Bolivar has been a prominent member of the Duck family. He has even been used in The Carl Barks Stories as a companion for Huey Dewey and Louie. In some comic strips Bolivar had a son named Behemoth, who disappeared without a trace later on.

Bolivar is unusual for a Disney character in that he is not anthropomorphized beyond showing an unusually broad range of facial expressions; he is actually represented with the characteristics of his species.

See also List of fictional dogs.