The 2018 FIM Women's Motocross World Championship was the 14th Women's Motocross World Championship season. Kiara Fontanesi successfully defended her title, after taking her fifth title in 2017. Yamaha was the defending Manufacturing champion.
A 6-round calendar for the 2018 season was announced on 25 October 2017.
Points are awarded to finishers of the main races, in the following format: