The following lists events that happened during 1818 in Chile.
Supreme Director of Chile: Bernardo O'Higgins
Royal Governor of Chile: Mariano Osorio (4 January-5 April)
12 February - The Chilean Declaration of Independence is approved by Bernardo O' Higgins.
15 March - Battle of Quechereguas
16 March - Second Battle of Cancha Rayada
19 March - Battle of Talca
5 April - Battle of Maipú
27 April - Naval Battle of Valparaiso
19 October - The Spanish frigate Maria Isabel is captured by a Chilean squadron commanded by Manuel Blanco Encalada.
23 October - Chilean constitutional referendum, 1818
11 December - Thomas Cochrane, 10th Earl of Dundonald takes command of the Chilean Navy.
24 April - Juan Esteban Rodriguez Segura
5 April - Santiago Bueras
5 April - Manuel María de Toro, 3rd Count of la Conquista
8 April - Luis Carrera
26 May - Manuel Rodríguez Erdoíza
17 December - Fernando Márquez de la Plata
