The Jaca uprising was a military revolt on 12–13 December 1930 in Jaca, Huesca, Spain, with the purpose of overthrowing the monarchy of Spain. The revolt was launched prematurely, was poorly organized and was quickly suppressed. Its leaders were executed or imprisoned. However, the revolt sparked political upheavals that led to declaration of the Second Spanish Republic a few months later.

Jaca is a city of northeastern Spain in the province of Huesca, located near the Pyrenees and the border with France. Jaca is an ancient fort on the Aragón River, situated at the crossing of two great early medieval routes, one from Toulouse to Santiago de Compostela and Pau to Zaragoza. Jaca was the city out of which the County and Kingdom of Aragon developed. It was the first capital of the Kingdom of Aragon until 1096 and also the capital of Jacetania.