The 2003 Ladbrokes.com World Darts Championship was the tenth World Championship organised by the Professional Darts Corporation since its split from the British Darts Organisation in 1993. The tournament took place between 27 December 2002 and 5 January 2003 at the Circus Tavern in Purfleet, England. Ladbrokes (who sponsored the 1996 event with their Vernon's brand) took over sponsorship of the event from Skol.
The field at the televised stages was expanded for the first time since 1999, adding an extra qualifying round that increased the total number of players from 32 to 40. John Part defeated the defending champion and number one seed, Phil Taylor, in the final. This ended Taylor's streak of eight successive World titles and 44 successive victories at the Circus Tavern.