Mauro Fernández Acuña (December 19, 1843 – July 16, 1905) was a Costa Rican politician and lawyer.
He studied law at the University of Santo Tomás from which he graduated in 1869. He reached several positions in the Supreme Court of Justice of Costa Rica and was university professor of the College of Lawyers. He was a delegate in the Costa Rican Constituent Assembly in 1880 and again in 1885, 1892 and 1902. He was President of the Congress, Minister of Property and Commerce, advisor of State and Director of the Bank of Costa Rica.
In 1885 he was named by the President Bernardo Soto Alfaro in the Secretary of Public Instruction, where he initiated a reform in Costa Rican education of the country, which triggered the closing of the University of Santo Tomás which he had ironically studied at and instead more funding was put into Secondary Education.
He died in San José on the 16 of July 1905. He was a declared a Benemérito de la Patria, a title given to honorable Costa Rican persons in history by Executive Decree 109 on June 18 of 1955.