The 2007–08 IRB Sevens World Series was the ninth of an annual IRB Sevens World Series of rugby sevens tournaments for full national sides run by the International Rugby Board since 1999–2000. The defending series champions, New Zealand, dominated this season's competition, winning the first five events, setting new records for consecutive tournament wins and consecutive match wins, and clinching the 2007–08 series with one tournament remaining after winning the Plate Final of the London leg. They ended with six wins out of the eight events.