The siege of Groningen was a two-month siege which commenced on 19 May 1594, and which took place during the Eighty Years' War and the Anglo-Spanish War. The Spanish-held city of Groningen was besieged by a Dutch and English army led by Prince Maurice of Orange. The Spanish surrendered the city on 22 July, after a failed relief attempt by the Count of Fuentes.
In a period of more than five years before Groningen fell, all the key strategic positions which led to or connected the city in vital ways were taken one by one. The capture was decisive for the Dutch Republic as the last of the Spanish forces had been pushed out of the Northern provinces ending their domination.