There were 7 teams in the 1950 First Grade Competition, Acton, Ainslie, Eastlake, Manuka, Queanbeyan, RMC and Turner.
Ainslie finished the home and away season in fourth position with 10 wins and 9 losses.
Ainslie lost to RMC in the First Semi-Final after leading by 26 points at half time. Ainslie failed to score a goal after half time while RMC kicked 9.
- Final score: Ainslie 6.13-49 def by RMC 11.6-72
- Best for Ainslie: Whatman, Bloomfield, Birch, Ross, Backen
The Ainslie team for the Semi-Final was:
- Backs: R Bloomfield, T Moore, J Cleary
- Half Backs: A Curtis, R Woolcott, B Birch
- Centres: T Evans, B Cain, F Carey
- Half Forwards: W Pillage, B Whatman, P Horgan
- Forwards: N Cleary, J Connelly, E O’Sullivan
- Ruck: J Backen, R Boorn, D Ross
- Reserves: M Griffith, P Platt, J Meeking
Manuka won its 5th Premiership by defeating Eastlake in the Grand Final, 9.13-67 to 6.6-42.
Bryan Birch, Bob Boorn and Bruce Whatman were selected in the Representative Team that played in the Carnival in Brisbane.
Ainslie player Brendon Cain won the Mulrooney Medal in a three way tie with P Eagles (Manuka) and K Schow (Queanbeyan).
Captain/Coach was Bob Bloomfield.
Ainslie Second Grade played Queanbeyan in the First Semi-Final. Ainslie were beaten by 4 points.
- Final score: Ainslie 8.13-61 def by Queanbeyan 9.11-65.
Ainslie player Richard Dunn won the Second Grade League Best and Fairest, with Ainslie player P Jefferies 1 vote back as equal Runner-up.
The Ainslie Intermediate team defeated Queanbeyan in the Second Semi-Final, 10.8-68 to 10.4-64 to go through to the Grand Final. They played Queanbeyan but lost by 9 points.
- Final score: Ainslie 7.7-49 def by Queanbeyan 8.10-58
- Goal Kickers: McCullough 2, Foster 1, Loftus 1, Pillage 1, Keogh 1, Jones 1.
- Best for Ainslie: Ray, Hawke, James, Betts, Loftus.
Allan Hawke was runner up in the Intermediate Grade League Best & Fairest Award.
Junior Team were beaten in the Grand Final by Eastlake.
- Final score: Ainslie 2.0-12 def by Eastlake 8.12-60
- Goal kickers for Ainslie: Loftus 1, O’Brien 1
- Best: Douglas, Boyd, O’Keefe, Loftus, Hamilton, O’Brien
John Loftus won the League Junior Grade Best & Fairest Award.
Sub Juniors reached the Grand Final but were defeated by Eastlake.
- Final score: Ainslie 3.2-20 def by Eastlake 19.19-133
- Goal kickers for Ainslie: Lovering 1, R Hincksman 1, B Hincksman 1
- Best: Hincksman, Phillips, Harrington, McCullough
Midgets lost the First Semi-Final to Acton