The 2009 Southern 100 Races were held between Monday 13 July and Thursday 16 July on the 4.25-mile Billown Circuit near Castletown, Isle of Man.

The main event was won by Guy Martin claiming victory in the 2009 Southern 100 Solo Championship race.

[1] Sixteen races were held, with Ryan Farquhar taking the most wins with four victories.

Roy Richardson and William Dunlop took double victories with, Jamie O'Brien, Dennis Booth, Dave Madsen-Mygdal and Stephen McIlvenna all achieving solo victories.

Steven Coombes and Paul Knapton, Ian and Carl Bell, and Glyn Jones and Jason Slous all tasted sidecar success during the meeting.