The Constitution of 1793, also known as the Constitution of the Year I or the Montagnard Constitution, was the second constitution ratified for use during the French Revolution under the First Republic. Designed by the Montagnards, principally Maximilien Robespierre and Louis Saint-Just, it was intended to replace the constitutional monarchy of 1791 and the Girondin constitutional project. With sweeping plans for democratization and wealth redistribution, the new document promised a significant departure from the relatively moderate goals of the Revolution in previous years.

The French Revolution was a period of political and societal change in France that began with the Estates General of 1789, and ended with the coup of 18 Brumaire in November 1799 and the formation of the French Consulate. Many of its ideas are considered fundamental principles of liberal democracy, while its values and institutions remain central to modern French political discourse.