Lionheart is an American Hardcore band from Oakland, California.
 
The music of Lionheart's first album was described as  Hardcore Punk-rooted Metalcore, and compared with Hatebreed. The musical style is comparable with Terror and Settle the Score. Lionheart uses musical elements of Beatdown Hardcore and Two-Step Garage in their sound. One more musical influence is Cro-Mags. Overall, Lionheart is categorized as a mixture of Hardcore Punk and Heavy Metal.
 
The band is known for their aggressive sound which can be compared with First Blood and Blood Stands Still.