1946 VFL thirds season

1946 VFL thirds season
Date3 May – 21 September
Teams7
PremiersNorth Melbourne
1st premiership
Minor premiersMelbourne
1st minor premiership

The 1946 VFL thirds season was the inaugural season of the VFL thirds, the Australian rules football competition operating as the junior competition to the Victorian Football League (VFL).

Only 7 of the 12 VFL clubs with senior teams fielded a thirds side in the inaugural season − Collingwood, Fitzroy, Footscray, Geelong and South Melbourne did not compete. Several VFL clubs already operated thirds teams in local competitions, while others were affiliated with existing junior clubs.

North Melbourne won the first grand final, defeating Carlton.