What is NACLO?

The North American Computational Linguistics Olympiad is a contest in which high-school students solve linguistic puzzles. In solving these puzzles, students learn about the diversity and consistency of language, while exercising logic skills. No prior knowledge of linguistics or second languages is necessary. Professionals in linguistics, computational linguistics and language technologies use dozens of languages to create engaging problems that represent cutting edge issues in their fields. The competition has attracted top students to study and work in those same fields. It is truly an opportunity for young people to experience a taste of natural-language processing in the 21st century.


  • Preliminary registration ends on January 16 at 3PM PST. Regular registration ends on January 25 at 3 PM PST. On-site registration may be available in the morning of January 26, right before the contest. Please contact your high school teacher (for high school sites) or the university site host (for university sites) for more information about on-site registration and local arrangements.
  • Student Registration for the January 26, 2017 contest. Note that registrations are not carried over from last year's contest. If you are getting an error message during registration, please contact naclo17org@umich.edu for assistance.
  • Article about NACLO by Margarita Misirpashaeva
  • July 18, 2016The NACLO 2017 Student Handbook
  • July 18, 2016The NACLO 2017 Coordinator Handbook
  • July 18, 2016The NACLO 2017 Appendix
  • June 7, 2016The 2017 contest will be on January 26 (Open Round) and March 9 (Invitational Round).
  • Thursday, March 31, 2016The problem sets for this year's Open and Invitational rounds are now available here.
  • Thursday, March 31, 2016Grading for the Invitational Round is over. The results are here.
  • Sunday, February 21, 2016The anonymized list of students who qualified for the second round is here.
  • Saturday, February 20, 2016The results from the Open Round have been announced. Students can log on to their accounts and see their scores. The cutoff for qualification is 44 points. A total of 174 students have qualified. The Invitational Round is on March 10. Please contact your site hosts for details.

Press Releases

  • August 3, 2016Press Release Performance of the NACLO teams at the IOL in Mysore.
  • July 18, 2016Press Release Three Teams from USA and Canada to Compete in the 14th International Linguistics Olympiad in Mysore, India.
  • Friday, April 8, 2016Press Release about the 2016 Invitational Round.

Please Donate

You can help support NACLO either by mailing a check or giving online. For more information on both, please see our donations page. We thank you for your support!


We're looking for new sites and problem contributors. Please contact us at naclo17org@umich.edu.