The ACTAFL Competition had six teams, Ainslie, Belconnen, Queanbeyan, Southern District, Tuggeranong and Weston Creek.
Ainslie First Grade was in third position after the home and away games with 9 wins and 6 losses. Queanbeyan finished in top place.
Ainslie defeated Belconnen in the First Semi-Final by 100 points.
- Final score: Ainslie 26.15-171 def Belconnen 10.11-71
- Goal kickers for Ainslie: Fleming 9, Zochling 4, Ireland 4, Trebilcock 3, Hannam 3, Mohrwinkel 2, Art 1
- Best: Zochling, Ireland, Wingate, Mohrwinkel, Carter, Art
Ainslie played Queanbeyan in the Preliminary Final. Ainslie had not beaten Queanbeyan during the season and Queanbeyan kept their record with a win by 18 points to end Ainslie’s season in third place.
- Final score: Ainslie 12.12-84 def by 14.18-102
- Goal kickers for Ainslie: Fleming 5, McCallum 2, Trebilcock 1, Ireland 1, Kelly 1, Wallensky 1, Mohrwinkel 1
- Best: McCallum, Gibson, Ireland, Baxter, Fleming
Ainslie’s team for the Preliminary Final was:
- Backs: Trebilcock, Scott Gibson, Greg Bishop
- Half Backs: Carter, Matt Conway, Ian Muir
- Centres: David McCallum, Maurice Wingate, Shane Art
- Half Forwards: Kelly, Brett Hannam, McTaggart
- Forwards: Jeff Mohrwinkel, Chris Fleming, Gerard Zochling
- Rucks: Denton, Ireland, Baxter
- Interchange from: Michael Richardson, Wallensky, Lynch
1991-Ainslie Second Grade Team
Ainslie Second Grade finished the home and away games in fourth position with 6 wins and 8 losses.
Ainslie played Queanbeyan in the First Semi-Final but were defeated by 10 points leaving them in fourth place.
- Final score: Ainslie 10.14-74 def by Queanbeyan 12.12-84
- Goal kickers for Ainslie: McHeachnie 3, Kelty 2, Collins 2, Palmer 1, Revet 1, Baxter 1
- Best: Lynch, Simsons, Woodland, Baxter, Kemp
1991-Ainslie Under 19 Premiership Team
The Ainslie Under 19 team finished the home and away games in third position.
The Under 19s had a big win over Tuggeranong in the First Semi-Final.
- Final score: Ainslie 23.16-154 def Tuggeranong 4.2-26
- Goal kickers for Ainslie: Read 6, Edwards 5, Garland 2, Kent 2, Vincent 2, Dollimore, Graham, Salisbury, Tournier, Whelan, King
- Best: Snowden, Whelan, Kent, O’Halloran, Edwards
Ainslie played Southern District in the Preliminary Final. Ainslie came from behind in the last quarter to win by 7 points and proceed through to the Grand Final.
- Goal kickers for Ainslie: J Read 4, Edwards, Kent, Pulford, Whelan
- Best: Kent, Dobson, Dolimore, Garland, Graham
In the Grand Final Ainslie upset a previously unbeaten Belconnen after an eight goal to one second quarter. Final score: Ainslie: 14.12-96 def Belconnen 8.10-58
- Goal kickers for Ainslie: J Read 6, Pulford 2, Garland 2, Vincent, Salisbury, Edwards, King
- Best: Garland, Dollimore, Snowden, Kent, Graham
Monaro
The Monaro team had a difficult year and finished out of the finals.