2004 Isle of Man TT

The 2004 Isle of Man TT was the 97th edition of the event. John McGuinness won three TT races, more than anyone that year. Dave Molyneux and Daniel Sayle took the two sidecar races, while Adrian Archibald won the marquee Senior TT.

The event marked the last TT race for 125cc bikes on the Mountain Course.

Three competitors died during the event: 125cc rider Serge Le Moal and sidecar passenger Paul Cowley during practice, and Colin Breeze during the Formula One TT race.