The Raid on Unadilla and Onaquaga was a military operation by Continental Army forces and New York militia against the Iroquois towns of Unadilla and Onaquaga in what is now upstate New York. In early October 1778, more than 250 men under the command of Lieutenant Colonel William Butler of the 4th Pennsylvania Regiment descended on the two hastily abandoned towns and destroyed them, razing most of the buildings and taking or destroying provisions, including the inhabitants' winter stores.
The raid was conducted in retaliation for a series of raids on frontier communities by Brant's Volunteers, led by Joseph Brant, and Butler's Rangers, under the command of Major John Butler, during the spring and summer of 1778. Unadilla was located in what is now the Village of Unadilla, Town of Unadilla, Otsego County, and Onaquaga was located in what is now the Town of Windsor, Broome County.