[1] It was run by the England and Wales Cricket Board (ECB) and was branded as the Vitality Blast due to the tournament's sponsorship.
[2] The Hampshire Hawks were the defending champions, having won their third title during the previous season.
[1] Somerset and the Hampshire Hawks won their home quarter-finals, while the Essex Eagles and Surrey also secured a place at Finals day with away wins against the Birmingham Bears and Lancashire Lightning respectively, thus producing an all South Group finals for only the second time; the last occurrence being in 2021.
In the final, Somerset beat the Essex Eagles by 14 runs to win their second title after an 18-year wait.
[4] Somerset won 15 of their 17 fixtures in the 2023 Vitality Blast, setting a new domestic T20 competition record for the number of wins in a season.