Jennifer Duncalf (born 10 November 1982) is a former professional squash player from England.

Duncalf was born in Haarlem, Netherlands but was a pupil at Harrogate Grammar School where she attended from 1994 to 2001.

In 2008, she finished runner-up at the British Open, losing in the final to Nicol David.

[2] In October 2010, in the women's singles final of the 2010 Commonwealth Games in Delhi, Duncalf was defeated by Nicol David 11–3, 11–5, 11–7 in 40 minutes to settle for the silver medal.

[5] She announced her retirement at the end of the 2019 season after gaining 133 caps for England.