| Conventional Long Name: | Republic of Liège |
| Common Name: | Liège |
| Era: | Early modern period |
| Status: | Unrecognised state |
| Status Text: | Revolutionary republic |
| Government Type: | Republic |
| Event Start: | Proclamation of the Republic |
| Date Start: | 18 August |
| Year Start: | 1789 |
| Event1: | Declaration of the Rights of Man and Citizen of Franchimont |
| Date Event1: | 16 September 1789 |
| Event End: | Restoration of the prince-bishopric |
| Date End: | 12 January |
| Year End: | 1791 |
| P1: | Prince-Bishopric of Liège |
| Flag P1: | LuikVlag.svg |
| S1: | Prince-Bishopric of Liège |
| Flag S1: | LuikVlag.svg |
| Image Map Caption: | Map of the republic's territories (white) between the United Belgian States (salmon), the Dutch Republic (yellow) and other entities (grey) |
| Capital: | Liège |
| Common Languages: | French, Walloon, Limburgish |
The Republic of Liège (French: République liégeoise) was a short-lived state centred on the town of Liège in modern-day Belgium. The republic was created in August 1789 after the Liège Revolution led to the destruction of the earlier ecclesiastical state which controlled the territory, the Prince-Bishopric of Liège. It coexisted with the even more short-lived revolutionary state, the United States of Belgium, created by the Brabant Revolution of 1789, to the north. By 1791, the forces of the republic had been defeated by Prussian and Austrian forces and the Prince-Bishopric was restored.
See main article: Liège Revolution. On 18 August 1789, Jean-Nicolas Bassenge and other democrats arrived at the Hôtel de Ville of Liège. They demanded the dismissal of current magistrates in favour of two popular burgomasters: Jacques-Joseph Fabry and Jean-Remy de Chestret. The citadel of Saint Walburge fell into the hands of the rebels. The Prince-Bishop, César-Constantin-François de Hoensbroeck, was brought back from his Summer Palace in Seraing to ratify the nomination of the new officials and to abolish the unpopular Règlement de 1684. Several days later, de Hoensbroeck fled to the city of Trier in modern Germany. The Holy Roman Empire condemned the Liège revolution and demanded the restoration of the ancien régime in the prince-bishopric.
The radical mood in Liège led to the proclamation of a republic, three years before France proclaimed itself a republic.
One of the first acts of the republic was the introduction of the "Declaration of the Rights of Man and Citizen of Franchimont" on 16 September 1789. The document was heavily influenced by the French Declaration of the Rights of Man and of the Citizen introduced in August 1789 but contained several important differences: