The 1990 English cricket season was the 91st in which the County Championship had been an official competition. The size of the seam on the cricket ball had been reduced markedly from 1989, and along with dry conditions and the extension of four-day cricket this enabled batsmen to make large scores and Graham Gooch became one of a handful of players to average over 100 in a first-class season. The County Championship was won by Middlesex. England defeated both New Zealand and India 1–0 in respective Test series.