Chaos Theory is a groove metal and hardcore band from Bordentown, New Jersey that formed in the mid-1990s and was part of the state's robust metallic hardcore scene during that era. The band drew on the collision of groove metal heaviness and hardcore intensity that defined much of the New Jersey underground at the time.

Chaos Theory is a thrash metal band from Hertford, North Carolina that delivers straightforward melodic thrash in a region not traditionally associated with the genre. The band operates independently within the North Carolina metal underground.

Chaos Warehouse is a progressive thrash metal band from Colorado Springs, Colorado that combines the compositional complexity of progressive metal with the raw brutality of thrash, addressing social and political themes in their lyrics. Their debut album Revolucien and follow-up Taking the Sun showcase a politically engaged approach to technical heavy metal.

Chaosmic is a progressive stoner metal band from Raleigh, North Carolina, formed in 2011, that fuses heavy psych and doom-influenced riffs with dynamic song structures drawing from influences ranging from Mastodon and Electric Wizard to Opeth and Tool. Their album Sunborn demonstrates their blend of heavy textures and melodic songwriting.

Chaosmonaut is an experimental doom and sludge metal band from Boise, Idaho, formed in 2017, that draws on jazz, drone, and progressive rock alongside classic doom influences like Yob and Earth. The band is known for long-form compositions and a freeform approach to heavy music.

Chaosmongers was a thrash metal band from Detroit, Michigan, formed in 2002, connected to other Detroit metal acts of the same period. The band remained an independent underground act throughout their existence before splitting up.

Chaosophy is a chaos gnostic black metal band from Madison, Wisconsin, formed in 2012, that channels anti-cosmic and occult themes through bleak, bludgeoning black metal compositions. Their self-titled debut and subsequent split with Terranaut reflect an uncompromising approach to the raw, atmospheric end of the genre.

Chaosphere is a US power and thrash metal band that fuses the melodic ambition of power metal with thrash aggression. The band operates independently, releasing music through their Bandcamp page.

Chaostrophe is a death metal band from St. Cloud, Minnesota, formed in 2008, that incorporates melodic and progressive elements into their approach to the genre. The band has operated independently in the Minnesota metal underground.