28 February - The 1945 South American Championship current Copa América, ends; Argentina is crowned champion, second place goes to Brazil, followed by Chile in third place, and Uruguay in fourth place.
15 May - The senators and deputies elected in the election of March 4 take office for the period May 15, 1945 - May 15, 1949.
20 May - The 3rd edition of the Championship of Champions ends, Colo-Colo is crowned champion of the championship.
Juneedit
19 June – 1945 El Teniente mining accident;355 workers die from carbon monoxide emissions. It is considered the largest accident in a metallurgical mine in the world.
^Dieter Nohlen (2005) Elections in the Americas: A data handbook, Volume II, p262 ISBN 978-0-19-928358-3
^Peers, E. Allison (1946). "Gabriela Mistral A tentative evaluation". Bulletin of Spanish Studies. 23: 101–116. doi:10.1080/14753825012331359810 – via Taylor & Francis Online.