Julia Machin (née Bennett, born 26 March 1970) is an English high jumper who competes for Epsom and Ewell Harriers.
She achieved her best of 1.92 metres on 6 March 1990, when winning at the AAA Indoor Championships at the age of just 19.
Her outdoor best of 1.89 metres was set on 11 June 1994, when winning the AAA title.
Having cleared 1.88m aged 35 in 2005, she went on to break the British masters age 40+ record with 1.78m in 2010, and to equal the British masters 45+ record with 1.65m in 2016.
The latter score (as of 2022) ranks her 10th on the British all-time list.