The Monaco Yacht Show (MYS) is an annual trade show in Monaco, organised by the British events and publishing company, Informa. The Monaco Yacht Show is held in Port Hercules, and is Europe's biggest in-water display of large yachts. The event was launched in 1991 as a broker-oriented event focused on superyachts over 20 m (66 ft) in length. 

In addition to the estimated 125 yachts on display, over 580 exhibitors including brokerage companies, superyacht builders, yacht designers, luxury brands, and luxury automobile companies participate in the event. 

The Monaco Yacht Show was founded in 1991 and organized by the French entrepreneur Maurice Cohen. In 1994, the rights to the event were sold to IIR, a management company that also held the rights to the Superyacht de Nice event. 

The event grew to host 65 yachts in 2002 and attracted nearly 15,000 visitors. In 2005, IIR was acquired by the British event organizer Informa for 2.4 billion. By 2016, the event had more than doubled its 2002 attendance numbers and increased the number of yachts in Port Hercules to 125. 

According to en.wikipedia