The 2025 Women's T20 Blast (also known as 2025 Women's Vitality Blast for sponsorship reasons) was the inaugural season of the Women's T20 Blast, a professional Twenty20 county cricket competition in England and Wales. The tournament was held from 30 May to 27 July 2025, with eighteen county teams taking part.
The tournament ran alongside the 2025 T20 Blast. In the finals, Surrey defeated Birmingham Bears to become champions of League One while Middlesex defeated Yorkshire to become champions of League Two.
The tournament was split into two categories: one contested by the eight counties in League One and the second featuring the 10 remaining teams split into two groups in League Two.
Eight teams from League One is competing in the inaugural season: the Birmingham Bears, Durham, Essex Eagles, Hampshire Hawks, Lancashire Thunder, Somerset, Surrey and The Blaze (Nottinghamshire). Glamorgan and Yorkshire Vikings 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 is competing in League Two in which each county plays eight group-stage matches (home-and-away) against the other four counties in their group. The top two teams from each group will progress to Finals Day. The teams are divided into the following groups:
The group stage winners progress directly to the final, while the 2nd and 3rd-place finishers compete in the semi-final.