The 2017 NatWest T20 Blast was the fifteenth edition of the T20 Blast formerly known as the NatWest T20 Blast, a professional domestic T20 competition league in England and Wales run by the ECB. The league consisted of the 18 first-class county teams divided into two divisions of nine teams each with fixtures played between July and September. Ahead of the final round of fixtures, 15 teams were still in a position to qualify for the quarter-finals.[1] The finals day took place at Edgbaston Cricket Ground in Birmingham on 2 September 2017. Nottinghamshire Outlaws were the competition winners.
The 18 competing teams were initially split into 2 divisions (North and South), each containing 9 teams, for the group stage of the competition. During the group stage (from July to September) each club played six of the other teams in the same division twice, once at a home stadium and once at a home ground of their opponents. They played the other two teams only once, for a total of 14 games each. Teams received two points for a win and one point for a tie or if a match was abandoned. Teams were ranked within their groups by total points, then net run rate. At the end of the group stage, the top four teams from each group entered the knockout stage of the competition.[2][3]