Background
MacMahon was born County Tyrone, Ireland, to a wealthy Irish family and served in the British army.
MacMahon was born County Tyrone, Ireland, to a wealthy Irish family and served in the British army.
He obtained a veterinary diploma in 1852, and soon left for Australia to join the gold rush. He arrived in Melbourne on 18 November 1852. When Mitchell went to England in 1854-1855, MacMahon became the acting Chief Commissioner of Victoria Police.
He was Chief Commissioner from 1856 to 1858 when he resigned, owing to a disagreement on a matter of discipline with the then Chief Secretary, Sir John O"Shanassy.
From August 1861 to August 1864 he represented West Bourke in the Victorian Legislative Assembly, and was minister without portfolio in the O"Shanassy ministry till June 1863. From February 1866 to around February 1878 he represented West Melbourne and was Speaker of the Assembly between April 1871 and April 1877.
In 1875 he was appointed Knight Bachelor for his services as Speaker. The elections of May 1877 brought in a new Berry ministry and change of Speakers.
MacMahon again represented West Melbourne in the assembly from 1880 to 1886 and was Speaker again from 11 May to 29 June 1880.
He retired from politics in 1886 and died in East Melbourne, Victoria, Australia. Charles MacMahon was twice married. First, to Sophie Campbell, sister of a Canadian barrister who became a magistrate at Beechworth, Victoria.
And second, to Clara Ann, daughter of C. J. Webster of Yea.
He had no children.
On 25 November 1853, MacMahon was appointed Assistant Commissioner of Police by William Henry Fancourt Mitchell and a member of the Victorian Legislative Council. MacMahon had been a member of the Executive and Legislative Councils in 1853-1856.