Carlos Coimbra da Luz (Portuguese: [ˈkaɾlus koˈĩbrɐ da ˈlus]; 4 August 1894 – 9 February 1961) was a Brazilian politician.
After the political crisis following the Getúlio Vargas suicide in 1954, Carlos Luz was the second of three presidents who ruled Brazil in a brief period of 16 months. At the time of President Café Filho's alleged illness he was the president of the Chamber of Deputies, and so the next in the line of succession to the Presidency, since Filho had been the Vice President under Vargas. Luz headed the government only three days in November 1955 and was replaced by the Minister of Defence Teixeira Lott over his fear that Luz might support a plot to prevent President-elect Juscelino Kubitschek from taking office.
As of 2016, Luz remains the shortest-serving President of Brazil.