The World Lacrosse Women's Championship (WLWC), formerly known as the Women's Lacrosse World Cup (WLWC), the international championship of women's lacrosse, is held every four years. From its inception in 1982, it was sponsored by the governing body for women's lacrosse, the International Federation of Women's Lacrosse Associations, until that body merged in 2008 with the former governing body for men's lacrosse. Since 2009, the WLWC has been sponsored by the sport's new unified governing body, the Federation of International Lacrosse. The 2017 Women's Lacrosse World Cup was held in Guildford, England, and was won by the United States over Canada by the score of 10-5.

Women's lacrosse, sometimes shortened to lax, is a field sport played at the international level with two opposing teams of ten players each. Originally played by indigenous peoples of the Americas, the modern women's game was introduced in 1890 at the St Leonard's School in St Andrews, Scotland. The rules of women's lacrosse differ significantly from men's field lacrosse. The two are often considered to be different sports with a common root.