The ACTAFL Competition consisted of 7 teams in 1979, Ainslie, Belconnen, Eastlake, Manuka, Queanbeyan, Sutherland and West Canberra.
Ainslie finished the home and away games on top of the ladder on percentage from Belconnen with both teams having 16 wins and 4 losses.
Ainslie played Belconnen in the Second Semi-Final at Phillip Oval. Belconnen were too good for Ainslie running out winners by 37 points.
- Final score: Ainslie 10.7-67 def by Belconnen 14.20-104
- Goal kickers for Ainslie: Brock 3, Davey 3, Grandin 3, McCormick 1
- Best: Hannam, Charles Smith, Bellchambers, McCormick, Gerrans
Ainslie played Manuka in the Preliminary Final.
- Final score: Ainslie 15.13-103 def Manuka 12.10-82
- Goal kickers for Ainslie: Neale 4, Davey 3, Shanley 3, Neeson 1, Charlie Smith 1, Stone 1, Holford 1, A Tutt 1
- Best: Shanley, Turner, Neale, Gerrans, Neeson
Ainslie met Belconnen again in the Grand Final at Manuka Oval. Ainslie won by 46 points.
- Final score: Ainslie 17.18-120 def Belconnen 11.8-74
- Goal kickers for Ainslie: Neale 5, Rafferty 2, Shanley 2, Holford 2, A Tutt 2, Neeson 1, McCormick 1, Stone 1, Craig Smith 1
- Best: Brock, Charles Smith, M Smith, Stone, Turner, Neale
The team for the Grand Final was:
- Backs: Ielasi, Gerrans, Charles Smith
- Half Backs: Turner, Hannam, Miller
- Centres: Holford, Bellchambers, Phillips
- Half Forwards: Stone, Davey, Shanley
- Forwards: Neeson, Neale, A Tutt
- Rucks: Brock, Rafferty, McCormick
- Interchange: M Smith, Craig Smith
- Captain Coach: Kevin Neale
- Vice Captain: Charles Smith
- Manager: Les Smith
Ainslie won the Club Championship.