NACLO @ Union College 2020

North American Computational Linguistics Open Competition
Hosted at Union College by Union College


What is it?

NACLO, the North American Computational Linguistics Open Competition is a fun (and educational!) contest for U.S. and Canadian high school and middle school students in which contestants compete by solving compelling and creative puzzles in linguistics and computational linguistics. No previous knowledge of linguistics, languages, or computing is required. The puzzles can be solved by analytic reasoning alone, and serve as a fun introduction to the field of (computational) linguistics. The puzzles are created by professionals in linguistics, computational linguistics and language technologies, who use dozens of languages to create engaging problems that represent cutting edge issues in their fields.

Winners of NACLO are eligible to compete in the International Linguistics Olympiad, one of twelve international high school science Olympiads.

Who can participate?

If you are a high-school or middle school student (grades 6-12) in the US or Canada, you are invited to participate. No previous knowledge of linguistics, languages, or computing is required. Participation is free. Please contact us at if you have any questions.

When is it?

Round 1 (Open): Thursday, January 23 2020; 10am-1pm. Please arrive at least half an hour early so that you can get settled in. We will be there from 9am on. And there will be some breakfast snacks.
Round 2 (Invitational): Thursday, March 5 2020; 9am-1pm.

Where is it?

Both rounds will be held at Union College.

Round 1 will be held at Union College in Lipman Hall, Room 200. Grant Hall is the Social Sciences. This map shows where it is on campus. The best places to park are probably either the Nott-Lenox Parking Lot or the Archilles Center Parking Lot.

There are many other competition sites across the United States and Canada. If you are not from the NY Capital Region and would like to participate, check the list of participating universities on the official NACLO web site to find a site near you.

How do I register?

Register on the main NACLO registration page.

How do I prepare?

You can find practice problems here.

I have some more questions

You can find more information at the main NACLO web site and in the NACLO 2020 handbook.

Feel free to contact the local organizers at Union College.

Kristina Striegnitz (
Nick Webb (

For more general questions about NACLO contact