On Friday, May 9, FIFA announced that the 2031 Women’s World Cup — which will most likely be hosted by the United States of America, plus other Concacaf nations — will have a field of 48 teams. That is an increase of 50% compared to its present size of 32. The decision was made by the FIFA Council (fifa.com).
The idea of expanding the Women’s World Cup to 32 teams had been discussed seriously by those within the FIFA Council since at least September 2024.
As to what a 48-team Women’s World Cup would look like, see this article from September 2024. That article includes a section on the potential field of teams as well as the potential pots for the draw that would determine the groups.
FIFA press release: “FIFA Council takes landmark decisions on the future of the FIFA Women’s World Cup™ and on the fight against racism” (9-May-2025)
U.S. Soccer press release: “U.S. Soccer and Concacaf Partners to co-host 2031 FIFA Women’s World Cup” (3-Apr-2025)
Women's Soccer Express 