Ellenburg is a town in Clinton County, New York, United States. The population was 1,842 at the 2020 census. The town is named after the daughter of the principal proprietor. Ellenburg is on the western border of the county and is northwest of Plattsburgh. The southern part of the town is situated in the Adirondack Park.

Clinton County is a county in the north-easternmost corner of the state of New York, in the United States and bordered by the Canadian province of Quebec. It is the northeastern most county in New York. As of the 2020 United States Census, the population was 79,843. Its county seat is the city of Plattsburgh. The county lies just south of the border with the Canadian province of Quebec and to the west of the State of Vermont. The county is named for George Clinton, the first Governor of New York, who later was elected as Vice President. He had been a Founding Father who represented New York in the Continental Congress. Clinton County comprises the Plattsburgh, New York Micropolitan statistical area. The county is part of the North Country region of the state.