The 2017–18 Biathlon World Cup (BWC) was a multi-race series over a season of biathlon, organised by the International Biathlon Union.

The season started on 24 November 2017 in Östersund, Sweden and ended on 25 March 2018 in Tyumen, Russia.

The defending overall champions from the 2016–17 Biathlon World Cup were Martin Fourcade of France and Laura Dahlmeier of Germany.

Below is the IBU World Cup calendar for the 2017–18 season.

The following notable biathletes retired during or after the 2017–18 season: