Ellenburg is a town in Clinton County, New York, United States. The population was 1,743 at the 2010 census. The town is named after the daughter of the principal proprietor. Ellenburg is on the west border of the county and is northwest of Plattsburgh. The south part of the town is in the Adirondack Park.
The area was first settled around 1800. Ellenburg is named for Ellen Murray, the daughter of John R. Murray, a landowner.
During the Cold War, Ellenburg was home to two of the twelve Atlas ICBM silos under the 556th Strategic Missile Squadron based out of the Plattsburgh Air Force Base. These silos were operational from 1962-1965.
In late 2004, a wind farm was proposed by Noble Environmental Power for the northern part of the town. Construction was expected to be completed by early 2007, but due to delays it began in the spring of 2008. Noble has also built wind farms in the neighboring towns of Altona and Chateaugay. Construction of the wind farms caused some controversy within the towns as many residents felt it would subtract from the natural beauty of the area. The wind farm includes 54 turbines producing a total output of 81 megawatts.