NACLO 2026

North American Computational Linguistics Olympiad

Department of Linguistics and Asian/Middle Eastern Languages

San Diego State University

What is NACLO?

The North American Computational Linguistics Olympiad 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.

When is NACLO?

The NACLO open round will be held from 9:00am to 12:00pm on January 29,  2026.  The regular registration deadline is January 26, 2026. The top 100 participants in the open round will be asked back for the invitational round to be held March 19, 2026.  Both events will be held at San Diego State University – watch this site for more details about the logistics.

How do I participate?

First, go to the NACLO website, try out some sample problems, and peruse the handbook to learn the competition rules.  Then register via the main website and select San Diego State University as your site.

Where is the NACLO open round?

The first round of competition will be held at San Diego State University in Storm Hall West, room 237.  Visitor parking is available in Parking Structure 12 (buy a permit from the vending machine on the top level or through the app).  A pedestrian bridge connects level 4 of PS12 to Ellen Ochoa Pavillion, near Storm Hall West.  Maps, directions to campus, and more information for visitors is available here.

Please plan to arrive at the exam room by 8:45am to allow time for registration.