'''Act III''' may refer to:
{{TOC right}} ==Companies, publications and brands== * Act III Broadcasting, a defunct American television broadcasting company * Act III Theatres, an American movie theater chain acquired in 1998 by Regal Entertainment Group * Act III Publishing, a defunct American Trade Magazine publisher active 1985-1991 * Act III Communications, an American media and communications company * Wyeth ''Act-3'', a drug composed of 'ibuprofen'; see Ibuprofen brand names * LGP-30#ACT-III_programming_language, Librascope ACT-III programming language
==Music== * ''Act III'' (Death Angel album), 1990 * ''Act III'' (the Seldom Scene album), 1973 * ''Act III: Life and Death'', an album by the Dear Hunter, 2009 * ''Act Three'' (G4 album), an album by G4, 2006 * Act III: This City Made Us, an album by the Protomen, 2026 * ''Act III'' (Kasabian album), an album by Kasabian, 2026
== See also == * Act (drama), a division or unit of a drama * Act II (disambiguation)
{{disambiguation}}