[1] John Ferrett entered the Queensland Legislative Assembly on 4 May 1860 at the 1860 colonial election as the member for the electoral district of Maranoa.

[2] On 13 June 1870, Samuel Hodgson, member for West Moreton, resigned.

[2] John Ferrett also served as a councillor on the Bundanba Divisional Board.

He also had a part ownership in the Woodend coal mines on the Bremer River.

[1] John Ferrett died suddenly from heart disease on 4 June 1894 at his home in Roderick Street, Ipswich.