John O'Brien (6 July 1866 – 8 October 1932) was a Member of the Queensland Legislative Assembly.
[1] O'Brien was born in Harlaxton, a suburb of Toowoomba, Queensland.
The son of Patrick O'Brien and his wife Mary (née O'Neil), he took over the family farm in 1887 after the death of his father.
He then became involved in road construction and was responsible for many public works in the Toowoomba area.
[2] Losing his farm after politics, he took up work as a yardman at a Hotel in Brisbane.