He was premier of the colony of New South Wales five times between 1872 and 1891. He was knighted in 1877.
He was first elected to the Legislative Council in 1854 and then the New South Wales Legislative Assembly in 1856 at the time New South Wales became self governing.
His image appears on the Australian $5 note.
The suburb of Parkes in Canberra is named after him.
The township of Parkes in central New South Wales is also named after him.