Manuel Aguilar Chacón (12 August 1797, San José, Costa Rica – 7 July 1846) was head of state of Costa Rica from April 1837 to March 1838.
He was born in San José, Costa Rica, on August 12, 1797. Was the son of Miguel Antonio Aguilar y Fernández (who ordained as a priest after widowing) and Josefa de la Luz Chacón y Aguilar. He got married in León, Nicaragua, on August 4, 1824 to Inés Cueto y García de la Llana, daughter of Luis de Cueto y Cortés de la Quintana y Teodora García de la Llana. In their home, their four children were born:
He obtained his bachelor's degree from the University of León in Nicaragua in 1820 and his Lawyer degree in 1821.
He became judge of Costa Rica in 1824, member and President of the Constituent Assembly through 1824-1825, General Ministry from 1825 to 1827, School Governing of la Casa de Enseñanza de Santo Tomás in 1826, Representative for San José in 1828, Elected federal Senator in 1828 (he was not able to take office at the time) and Federal Senator through(1832-1833). In 1830 he was elected by the Legislative Assembly as President of the Superior Court of Justice of Costa Rica, but he declined the position.
During 1833, while he was working as Federal Senator in Guatemala, the liberal groups from San José and Alajuela backed up his candidacy as chief of state of Costa Rica. Although he had the highest vote count, he was not able to achieve absolute majority and the Legislative Assembly chose José Rafael de Gallegos y Alvarado.
Manuel Aguilar Chacón returned to Costa Rica on November 21, 1833. And in 1835 he was elected again as Representative for San José to cover the period 1835-1837. He presided the house of Representatives in 1835. In March of that same year, when the elected Chief of State to conclude the period in Gallegos, Nicolás Ulloa Soto, declined the position, the Assembly voted in favor of Aguilar Chacón to assume top command but he refused to admit the electoral process.