| Competition: | wafl |
| Year: | 1945 |
| Teams: | 8 |
| Count: | 20 |
| Mpcount: | 25 |
| Matches: | 84 |
| Top Goal Scorer: | Bill Baker |
| Sandover Medal: | George Bailey |
| Prevseason: | 1941 (Open-Age) 1944 (Wartime Under-Age) |
| Nextseason: | 1946 |
The 1945 WANFL season was the 61st season of the various incarnations of the Western Australian National Football League.
During the 1944 season, participation had been restricted to players under nineteen as of October 1, 1944. After the season, it was clear to the WANFL that changes had to be made to this underage restriction,[1] since the Over-Age Footballers Association, the Metal Trades Association and services competitions were developing a good standard from players who were too old to play league football.[2] In October 1944, the WANFL agreed to raise the limit to 25 years of age as of December 31, 1945,[3] but this move proved ill-received and on March 29 the League decided to abolish age restrictions altogether, returning the WANFL to open-age competition.[4] There was concern that the erratic availability of players who were still in the services would cause difficulties,[5] which meant that the seconds competition, which was disbanded after 1940, was not resumed.
Numerous famous players of the era — amongst them Merv McIntosh and Bernie Naylor — remained entirely unavailable due to war service, and all clubs had to make constant changes to their lineups.[6] It was generally thought that the 1945 teams would largely be composed of under-age players from 1944, but this proved not to be the case as most either joined the military or proved uncompetitive in senior competition. East Perth, whose unbeaten under-age team of 1944 retained many more of its players than any other club,[7] found the going very tough in open competition and fell to sixth. Owing to the return of numerous top players from its 1941 team, including “Scranno” Jenkins, “Corp” Reilly, Alby Higham and Harry Carbon, South Fremantle, whose restricted-age team had at the close of 1944 lost 24 consecutive matches by an average of ninety-six points,[8] recovered in remarkable fashion to reach the Grand Final.
Claremont were forced to play home games at Subiaco and the W.A.C.A. due to the 1944 Claremont Oval fire[2] and the Claremont Showground, which would ordinarily have become an alternative Tiger home venue, being itself burned in a separate fire during January 1945,.[9] The Tigers finished last by six games, and would apart from a surprising narrow fourth position in 1952 remain perennial tailenders until Jim Conway took them from last to first in 1964, winning only 116 of 386 matches for a success rate of 30.05 percent. East Fremantle and West Perth, who contested the previous open-age Grand Final, against set the pace, but Old Easts dominated the latter part of the season and won the premiership.
A new innovation was the Simpson Medal, the first award in Australian sport for the best player in a Grand Final.