| 2015 Royal London One-Day Cup | |
| Fromdate: | 25 July |
| Todate: | 19 September 2015 |
| Administrator: | England and Wales Cricket Board |
| Cricket Format: | Limited overs cricket (50 overs) |
| Tournament Format: | Group stage and knockout |
| Champions: | Gloucestershire |
| Participants: | 18 |
| Matches: | 79 |
| Most Runs: | 531 Michael Klinger (Gloucestershire) |
| Most Wickets: | 20 Reece Topley (Essex) |
| Previous Year: | 2014 |
| Previous Tournament: | 2014 Royal London One-Day Cup |
| Next Year: | 2016 |
| Next Tournament: | 2016 Royal London One-Day Cup |
| Website: | ecb.co.uk |
The 2015 Royal London One-Day Cup tournament was the scheduled limited overs cricket competition for 2015 season of England and Wales first-class counties.[1] [2] It was won by Gloucestershire County Cricket Club, who defeated Surrey by the narrow margin of six runs, despite a hat-trick from Jade Dernbach, in what was described as 'a thrilling finish'.[3] The title was Gloucestershire's first trophy since the 2004 Cheltenham & Gloucester Trophy,[4] when they defeated a Worcestershire side that included 2015 Surrey captain Gareth Batty.[5]
The competition consisted of two groups of nine teams, with the top four teams from each group progress to the quarter-finals.[1] The groups for the 2015 season were drawn and are shown below in their respective groups.[6]