The 2009 ITU World Championship Series was a series of seven triathlon events leading to a Grand Final held in Gold Coast, Queensland, Australia in September 2009.

The series featured on four continents in the inaugural year, stopping in some locations previously used as successful World Cup race destinations, as well as the first chance for athletes to try out the venue of the 2012 Olympic Triathlon at Hyde Park in London.

The prize purses offered to the top performers during the series were significantly greater than previous World Championship events, with a total of US$700,000 being distributed.

Additionally $150,000 was distributed at each of the 2009 World Championship Events, and $250,000 at the Grand Final.

[3] Points were distributed at each World Championship Event to the top 40 finishers in the men's and women's elite races, and to the top 50 finishers at the Grand Final.