Charles Morris Russell Dumas (1851 – 19 February 1935), generally referred to as Charles M. R. Dumas, was a South Australian newspaper proprietor and politician. He was the proprietor of The Mount Barker Courier and Onkaparinga and Gumeracha Advertiser for 54 years and served as president of the South Australian Provincial Press Association from 1915 until his death. He was a member of the South Australian House of Assembly from 1898 to 1902, representing the electorate of Mount Barker.