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.


  • July 18, 2016The NACLO 2017 Student Handbook
  • July 18, 2016The NACLO 2017 Coordinator Handbook
  • July 18, 2016The NACLO 2017 Appendix
  • 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.
  • June 7, 2016The 2017 contest will be on January 26 (Open Round) and March 9 (Invitational Round).
  • Friday, April 8, 2016Press Release about the 2016 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.
  • Thursday January 28, 2016Registration is open again for walk-ins at sites that allow walk-ins.
  • Wednesday January 27, 2016Registration is closed for the rest of the day (01/27). If your site allows walk-ins, you will again be able to register on the day of the contest (01/28), either before the contest starts, or right after it ends. You need to get a registration number in order to for your submission to be scored.
  • Monday September 14, 2015The 2016 handbook is split into three parts:
    NACLO 2016 Student Handbook  / NACLO 2016 Coordinator Handbook  / NACLO 2016 Handbook Appendix.
  • Saturday September 5, 2015Registration for the 2016 competition will start in late September. Please check this page again after Sep. 25. Note: Student registrations are not carried over from 2015.
  • Saturday September 5, 2015The 2016 Open (First) round is scheduled for January 28, 2016
  • Saturday September 5, 2015The 2016 Invitational round is scheduled for March 10, 2016

Press Releases

Past Results

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 naclo16org@umich.edu.