The 1991 NatWest Trophy was a limited-overs English county cricket tournament, held between 26 June and 7 September 1991.
[1] The competition was won by Hampshire who beat Surrey by 4 wickets in the final at Lord's.
The seventeen first-class counties, joined by 13 Minor Counties: Bedfordshire, Berkshire, Buckinghamshire, Cambridgeshire, Devon, Dorset, Durham, Hertfordshire, Lincolnshire, Norfolk, Oxfordshire, Shropshire and Staffordshire.
The Ireland national cricket team and the Scotland national cricket team also participated.
The winners in the second round then progressed to the quarter-final stages.