Chicago International Model United Nations

It's your world. Fix it.

December 3-6, 2026

Register Today

Chicago International Model United Nations

It's your world. Fix it.

Welcome to CIMUN 2026 - Chicago's premier Model UN experience where high school delegates tackle global challenges through innovative diplomacy, realistic portrayal of national interest, and strategic problem-solving.



The 23rd annual Chicago International Model UN (CIMUN) features our unique simulation style that mirrors real-world international relations, developed by the Institute for Diplomacy Education and Advocacy (IDEA).

December 3-6, 2026
Fairmont Chicago Millennium Park
200 N Columbus Dr, Chicago, Illinois

Register Today
A cluttered table with various items including a blue tin of biscuit cookies, a black microphone, a Halloween wig with a gold crown headband, a hair curling iron, a yellow folder, a black facial mask, a black pouch, a cardboard box, a wooden puzzle, and some electronic accessories.
A man with a beard and brown hair in a news studio, dressed in a suit and tie, reporting on election results and violence in Taiwan, with a news banner at the bottom of the screen.

Experience diplomatic interconnection

Unlike traditional Model UN conferences, CIMUN features fully integrated committees where actions in one body directly impact others. Delegates must collaborate as country teams to advance their national interests across multiple fronts simultaneously.

Our unique awards system recognizes both diplomatic expertise and political innovation, rewarding delegates who master their country's position while demonstrating adaptability in complex scenarios.

Two men are engaged in a conversation in a well-lit conference room. One man is wearing a red blazer and has dark hair, while the other man is dressed in a black suit with a red tie and has a beard and is bald. In the background, there are other people working or sitting at tables, and the room has large windows with beige and black curtains.
A man in a suit, hat, and glasses talking to a group of young people at a formal event or conference. The young people appear engaged and are listening to him. The setting looks like a conference hall or hotel lobby.
A group of young people sitting around a conference table with nameplates from different countries, including the United States, Syria, and Russia, participating in a model United Nations conference. Some participants are taking notes, while others are listening attentively. Several individuals are standing at the back, and there are laptops and documents on the table.

Opening Ceremonies & Banquet

Begin your CIMUN experience with our elegant opening plated banquet featuring distinguished speakers from diplomatic and international affairs backgrounds. This formal plated dinner provides delegates the perfect opportunity to network with peers and faculty while setting the professional tone for the conference.

Young man raising his hand at a conference or meeting, holding a paper with 'Malawi' written on it. Several other young adults are seated around him, some with laptops, in a large conference room.
A conference table with a sign labeled 'Mexico,' a large stack of papers in a binder with sticky notes, a Starbucks coffee cup, and people in the background.
Young people, dressed in formal business attire, seated at a long conference table with laptops and tablets, attending a meeting or conference in a professional setting.

What Sets cimun apart

CIMUN delivers an unparalleled educational experience that transforms how students understand global politics and diplomacy.

Our conferences mirror actual international relations dynamics, preparing delegates for future leadership roles while building crucial skills in negotiation, public speaking, and strategic thinking.

Learn More
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Dynamic Crisis Simulations That Evolve in Real-Time

Our dedicated crisis staff creates breaking developments throughout the conference, challenging delegates to respond to unexpected events just as real diplomats must do.

This year features our most ambitious integrated simulation yet, focusing on our acclaimed Historical Simulation set in 1989. Delegates will navigate complex geopolitical challenges in a unique historical context.

Large conference room filled with people seated at round tables, with a panel of speakers on stage. A presentation screen displays a logo with Latin text and a globe, suggesting an international or diplomatic event.