NACLO 2024 - North American Computational Linguistics Open competition
Columbia University, Computer Science Department

Important Dates:

January 25, 2024
Location: 750 CEPSR
NACLO Open Round (first round)

March 14, 2024
Time TBA
NACLO Invitational Round (second round)

What is NACLO?

NACLO (the North American Computational Linguistics Open competition) is a contest in which high-school students, as well as middle-school students, solve problems relating to linguistics and computational linguistics. No prior knowledge of linguistics or second languages is required. Students may participate at their high school or at a nearby university site. This year, Columbia University will be one of the local university site for the New York metropolitan area. The open round of the contest will take place on Thursday, January 25, 2024. Well-performing students will be invited to the second (invitational) round, which is scheduled to take place on March 14, 2024. The top students in the second round will have a chance to participate in the International Linguistics Olympiad, one of thirteen international high school science Olympiads.

More information about NACLO, including a student handbook and practice problems, can be found at the official NACLO website,


How can I register for the Open (first) Round?

Students who are interested can register at the NACLO registration site. Registration deadline January 23
Participation in the event is free.


Where is the Columbia University location for the Open (first) Round?

Columbia University will hold the NACLO Competition Open Round on its Morningside Heights campus. The exact location will be communicated to participants by email prior to the competition.


When should I arrive for the Open (first) Round?

The contest begins promptly at 10am and runs three hours until 1pm on Thursday, January 25, 2024. Please arrive no later than 9:30am in order to have the instructions read to you. Students who arrive late are not allowed to have extra time to have instructions/ announcements repeated for them.


Where is the Columbia University site for second (invitational) round?

To be announced.


When should I arrive for the second (invitational) round?

To be announced.


What should I study?

Some sample questions for practice are available here.
Columbia does not currently offer preparation workshops, but other local sites may offer events.


Who should I contact?

  • Site host, main site contact: Dr. Daniel Bauer, <bauer [at]>
    Site host: Prof. Kathy McKeown

webmaster - bauer [at] last updated - 01/15/23