The Australian Computational and Linguistics Olympiad (OzCLO) is a volunteer-run contest about language for secondary school students. The contest challenges students to develop their own strategies in teams of four to solve problems about fascinating real languages.

Results for OzCLO 2023 are now available.

Please contact your local organiser if you have not received your school’s results.

Congratulations to all 2531 students who participated from 95 schools around the country.

OzCLO 2024 Timeline

Registrations open

Registrations closed

Round 1 Online Competition

Round 2 Offline Competition

Current competition

All the information about the upcoming competition, including the competition format and important dates.


Register your students for the upcoming contest.


Find training material and past problems here.

Past competitions

Competition details and results for past years.

About us

How OzCLO works, and who we are.

OzCLO on social media: