The 1966 Gillette Cup was the fourth Gillette Cup, an English limited overs county cricket tournament.
[1] The tournament was won by Warwickshire County Cricket Club in the final at Lord's.
The 17 first-class counties, were joined by five Minor Counties: Berkshire, Cheshire, Hertfordshire, Lincolnshire and Suffolk.
The winners in the second round then progressed to the quarter-final stage.
Winners from the quarter-finals then progressed to the semi-finals from which the winners then went on to the final at Lord's which was held on 3 September 1966.