Model United Nations, also known as Model UN or MUN, is an extra-curricular activity in which students typically roleplay delegates to the United Nations and simulate UN committees. Thousands of middle school, high school, and college students across the country and around the world participate in Model UN, which involves substantial researching, public speaking, debating, and writing skills, as well as critical thinking, teamwork, and leadership abilities.

This activity takes place at Model UN conferences, which are usually organized by a high school or college Model UN club. At the end of most conferences, outstanding delegates in each committee are recognized and given an award certificate; the Best Delegate in each committee, however, receives a gavel.