Klaw (Ulysses Klaue) is a fictional character, a supervillain appearing in American comic books published by Marvel Comics. The character is depicted as a human physicist who has been transformed into solid sound, and who wears a sonic emitter on his right wrist as a prosthetic device. He has often been shown in conflict with the Fantastic Four and the Avengers and is an enemy of the Black Panther and Ka-Zar.

The character is featured in other Marvel-endorsed products such as arcade and video games, animated television series, and merchandise such as trading cards. Andy Serkis portrays the character in the Marvel Cinematic Universe, first appearing in the 2015 film Avengers: Age of Ultron and reprising the role in the 2018 film Black Panther.