[13] The season also had the 2021 Bob Willis Trophy, which was played as a five-day final between the teams that finished first and second in County Championship Division One.
[14] Four international men's sides toured the country this season: New Zealand, Sri Lanka, Pakistan and India.
[19] Prior to the Test series, New Zealand was scheduled to play a tour match against Somerset which was cancelled due to COVID-19 pandemic.
[28] Before the start of the series, Sri Lanka were scheduled to play two one-day tour matches against Kent and Sussex, which were cancelled due to COVID-19 pandemic.
[35][36] Prior to the ODI series, Pakistan were scheduled to play two one-day matches against Northamptonshire and Worcestershire, which were cancelled due to safety concerns.
[15] Prior to the England series, India were scheduled to play the inaugural final of 2019–2021 ICC World Test Championship from 18 to 22 June at Southampton.
[44] The fifth and final Test match at Manchester was cancelled[45][46] due to COVID-19 cases in the Indian team's coaching and support staff,[47] with the result of the series yet to be decided officially.
[60] Following the end of the County Championship season, the top two sides in Division One competed for the Bob Willis Trophy in a five-day final at Lord's.
[61] The Royal London One-Day Cup took place in July and August, with the eighteen counties divided into two groups of nine.
[66] The inaugural season of the Charlotte Edwards Cup (initially named the Women's Regional T20) took place in 2021, running from June to September.
The eight teams were divided into two groups, with South East Stars, Northern Diamonds and Southern Vipers progressing to Finals Day at the Rose Bowl.
[69][70][71] The National Counties Championship took place between July and September, with the final won by Oxfordshire over Suffolk.