John Fletcher Hargrave QC (28 December 1815 – 23 February 1885) was a British-born Australian politician and judge.

He retired from the bar in 1851 and some time after was committed to an asylum at Colney Hatch in Middlesex by his wife and he gradually recovered there.

He resigned from the bench in February 1859 as his judgeship was "disastrous for women suitors" as he regularly decided against them.

[4] East Camden was abolished in 1859, partly replaced by Illawarra, and Hargrave was successful at the election on 15 June,[5] but only served until 11 October 1859, when he resigned to accept an appointment to the Legislative Council.

[7][8] Hargrave was Solicitor General from 1 August 1863 and 15 October 1863 and again in the fourth Cowper ministry from 3 February until 21 June 1865.

[9] He became reader in general jurisprudence at the University of Sydney, becoming the colony's first law lecturer on 3 August 1858.

[10] He died at Rushcutters Bay on 23 February 1885(1885-02-23) (aged 69)[11] and was buried in Waverley Cemetery.