Charles Stuart Fern (1 October 1884 – 18 April 1918) was a Labor Party politician who served as Member for Cobar in the New South Wales Legislative Assembly from 1911 to 1918.
He was an active member of the Amalgamated Miners' Association, serving as an organiser and secretary of the union, as well as representing it on the wages board.
In December 1911 Fern was elected to the NSW legislative assembly as member for the Electoral district of Cobar.
A supporter of conscription in World War I, Fern joined the Universal Service League in 1915.
He served as a member of the 17th and 16th Battalions of the Australian Imperial Force from 1915 to 1916, attaining the rank of Lance Corporal.