Denison College offers a broad range of co-curricular and extra-curricular sports programs for students, including:
- Combined High Schools Sport – cricket, football (soccer), rugby league, swimming, cross country, athletics, triatholon, netball, basketball, touch football.
- Astley Cup Sporting Interchange with Orange High and Dubbo College.
- School sport U15 level.
- Girri Girri Sports Academy.
- CKC Cup (Canobolas, Kelso, Cowra).