A prolific batsman at county level for her home county of Devon, Knight has played for the Diamonds, the Rubies and England Academy Women in addition to the England Women's team. She topped the county run scoring aggregates in both 2008 and 2009. Knight plays club cricket for Plymstock Cricket Club in the Devon Cricket League where she opens the batting for the first team. Heather started attending colts training sessions at just 8 years old and progressed through the youth system at Plymstock. In November 2018, she was named in the Hobart Hurricanes' squad for the 2018–19 Women's Big Bash League season.
England
Knight was called into the England squad on their tour of India in 2010 as a replacement for the injured Sarah Taylor and played in the 5th One Day International on 1 March in Mumbai, opening the batting and scoring 49 on her international debut. She toured Sri Lanka with the England team in 2010, making her Twenty20 debut in the 2nd match of the series on 22 November in Colombo. She made her test debut in the one-off Ashes test at Sydney's Bankstown Oval in January 2011. She is the holder of one of the first tranche of 18 ECB central contracts for women players, which were announced in April 2014. On 5 June 2016, Knight was appointed captain of the England women's cricket team after Charlotte Edwards stood down. She also became the first female cricketer to score a fifty and to take a five wicket haul in an ODI innings
Heather Knight led the England team in her first Women's Cricket World Cup as captain, and they won the tournament despite losing to India in the opening match. In the second group match against Pakistan she, along with Natalie Sciver, went on to put on a record 3rd-wicket partnership in the history of Women's Cricket World Cup as England managed to defeat Pakistan convincingly by 107 runs In the final at Lord's Knight led England to a 9 run victory over India. Following the team's success, she was awarded an OBE in the Queen's 2018 New Year Honours list. In April 2018 she was named one of the five Wisden Cricketers of the Year for her part in the 2017 World Cup victory.
In October 2018, she was named as the captain of England's squad for the 2018 ICC Women's World Twenty20 tournament in the West Indies. In February 2019, she was awarded a full central contract by the England and Wales Cricket Board for 2019. In June 2019, the ECB named her in England's squad for their opening match against Australia to contest the Women's Ashes. On 12 December 2019, during England's series against Pakistan in Malaysia, Knight became the tenth woman for England to play in 100 WODI matches. In January 2020, Knight was named as the captain of England's squad for the 2020 ICC Women's T20 World Cup in Australia. In England's second match of the tournament, against Thailand, Knight scored her 1,000th run in WT20Is. She also scored her first century in WT20I cricket, and became the first cricketer to score a century in all three formats of women's international cricket. On 18 June 2020, Knight was named in a squad of 24 players to begin training ahead of international women's fixtures starting in England following the COVID-19 pandemic.
Personal life
Knight's nickname is "Trev". In 2015, she explained to sports journalist Clare Balding that "When I was about 13 and introduced myself at cricket camp, they thought I said Trevor rather than Heather!" Knight also has a partner, Tim, who is an accountant.