English colonists established counties in eastern present-day New York State in 1683; at the time, the territory of the present Madison County was considered part of Albany County, with the city of Albany located on the Hudson River. This was an enormous county, including the northern part of New York State around Albany as well as all of the present State of Vermont and, in theory, extending westward to the Pacific Ocean. It was claimed by the English but largely occupied by the Oneida, Onondaga, Seneca, Cayuga and Mohawk, who had the territory in the central Mohawk Valley, as well as Mahican near the Hudson River. On July 3, 1766, the English organized Cumberland County, and on March 16, 1770 they organized Gloucester County, both containing territory now included in the state of Vermont.