The 2002–03 Biathlon World Cup was a multi-race tournament over a season of biathlon, organised by the International Biathlon Union.

The men's overall World Cup was won by Norway's Ole Einar Bjørndalen, while Martina Glagow of Germany claimed the women's overall World Cup.

Below is the World Cup calendar for the 2004–05 season.

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The following notable biathletes retired after the 2002–03 season: