Ticketmaster is the world's largest seller of event tickets. It is based in West Hollywood, California, USA, but has operations in many countries around the world. Typically, Ticketmaster's clients (arenas, stadiums, and theatres) control their events, and Ticketmaster simply acts as an agent, selling the tickets that the clients make available to them.

TicketMaster is one of the leading Primary Ticketing agencies in the United States.