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North American Computational Linguistics Open competition

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What is NACLO?

​The North American Computational Linguistics Open competition (NACLO) is a fun (and educational!) contest for U.S. and Canadian high school students in which contestants compete by solving compelling and creative puzzles in linguistics and computational linguistics. Requiring no previous knowledge of linguistics, languages, or computing, these puzzles can be solved by analytic reasoning alone, and serve as a fun introduction to a field to which many high school students have never been introduced. Winners of NACLO are eligible to compete in the International Linguistics Olympiad, one of twelve international high school science Olympiads.

Find more information, including the student handbook, go to

How do I join the contest?

You can register through the NACLO web site ( The registration form is located by clicking on the "student" tab.


Date, Time, and Location

Open Round: January 23, 2020, 10am–1pm, Gore Hall #204

Invitational Round: March 5, 2020, 9am–1pm, Location TBD

Participants should try to arrive about 45 minutes prior to the scheduled start time.


For directions to the university and campus maps, visit

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North American Computational Linguistics Open competition
  • Department of Linguistics and Cognitive Science
  • 125 E. Main Street
  • University of Delaware
  • Newark, DE 19716, USA
  • Phone: 302-831-6806
  • Fax: 302-831-6896