Charles Louis von Doussa (17 May 1850 – 27 May 1932), generally referred to as Louis von Doussa, was an Australian lawyer and politician. He was a member of the South Australian House of Assembly for Mount Barker from 1889 to 1902 and a member of the South Australian Legislative Council for the Southern District from 1903 to 1905. He was Attorney-General of South Australia and Minister for Education in the Jenkins government from 1903 to 1904.
Von Doussa was born in Hahndorf the second son of (Emil Louis) Alfred von Doussa (ca.1809 – 17 December 1882), an officer of the Prussian army, who emigrated to South Australia in 1846 with his wife Anna Dorothea von Doussa, née Schach. (ca.1811 – 17 March 1881) He was educated at Hahndorf College and afterwards tutored privately by George R. Irvine, formerly a master at St. Peter's College. On 11 June 1866 he was articled to J. J. Bonnar of Strathalbyn, and admitted to the bar in 1871. He began practice at Mount Barker in 1872.
Von Doussa represented the House of Assembly electoral district of Mount Barker from 1899 to 1902, then was defeated by a narrow majority when the Mount Barker, Noarlunga and Encounter Bay districts were merged into the electoral district of Alexandra. In December 1903 he was elected unopposed to the seat in the Legislative Council vacated when John Hannah Gordon was elevated to the bench of the Supreme Court of South Australia. He was appointed Attorney-General of South Australia and Minister of Education in the Jenkins Ministry, but relinquished both in 1904 when his health suffered. He retired from politics in 1905.