The following lists events that happened during 1990 in Chile.
- February 18 :
- A bus from the Ramos Cholele company collides with a truck near Taltal, leaving 22 dead and 30 injured.
- The shipwreck of the fishing boat "Calypso I" that transported members of the amateur football club "Barrio Miraflores" in the bay of Corral, near Valdivia, takes place. Leaving 21 deceased.
- March 8 – Admiral José Toribio Merino accepts his resignation as the Commander in Chief of the Chilean Navy.
- March 10 – The Organic Constitutional Law on Education was published for the first time.
- March 11 – Patricio Aylwin assumes as president, marks the end of the 17 year dictatorial of Augusto Pinochet.
- March 21 – In an attack initially attributed to the Manuel Rodríguez Patriotic Front, the former Commander-in-Chief of the Air Force, Gustavo Leigh, suffers serious injuries and loses an eye, but survives.
- 31 March – Death of Jonathan Moyle