The T20 Blast Women, officially known as the Vitality Blast Women for sponsorship reasons, is a professional women's Twenty20 county cricket competition in England and Wales, run by the England and Wales Cricket Board (ECB). Launched in 2025, it serves as the successor to the Charlotte Edwards Cup.
The tournament is split into two categories: one contested by the eight counties in League 1 and the second featuring the 10 remaining counties in League 2.
Eight teams from League 1 are competing in the inaugural 2025 season: the Birmingham Bears, Durham, Essex, Hampshire, the Lancashire Thunder, Somerset, Surrey, and The Blaze (Nottinghamshire). Yorkshire will be awarded tier-one status and join the league in 2026, then Glamorgan will be awarded tier-one status and join the league in 2027 while a further two clubs will be awarded tier-one status in 2029.
The remaining ten teams compete in League 2, in which each county plays eight group-stage matches (home-and-away) against the other four counties in their group. The teams are divided into the following groups: