The Philip C. Jessup International Law Moot Court Competition, commonly known as Jessup, is the world's largest moot court competition focusing on international law. Named after a judge of the International Court of Justice, the competition began in the United States in 1960. Today, it attracts students from over 500 law schools and universities across more than 80 countries.

An international law moot court is an educational simulation in which students engage in legal arguments as representatives of fictional states involved in a dispute. Widely practiced in Europe and North America, it is considered a highly effective tool for legal education. In Jessup, students compete in two phases—written memorials and oral pleadings—based on procedures of the International Court of Justice (ICJ), the principal judicial organ of the United Nations, which serves as the setting for the competition.