• Speaker (politics), the presiding officer in a legislative assembly
• Speaker of the British House of Commons
• Speaker of the United States House of Representatives
• "Speaker" (song), single by David Banner on his album The Greatest Story Ever Told
• Speaker for the Dead, a science fiction novel by Orson Scott Card
• Speaker Township, Michigan, U.S.
• HMS Speaker (D90), a WWII Royal Navy aircraft carrier

Speaker may also be:

• Orator, or public speaker, one who gives a speech or lecture
• Loudspeaker, an electromechanical device which produces sound