The 2018 Royal London One-Day Cup tournament is a limited overs cricket competition that forms part of the 2018 domestic cricket season in England and Wales. Matches will be contested over 50 overs per side and had List A cricket status. All eighteen First-class counties competed in the tournament which will run from the mid of May with the final taking place at Lord’s on 30 June. Nottinghamshire are the defending champions of the tournament after beating Surrey in 2017 Finals.