Woodcliff Lake is a borough in Bergen County, New Jersey, United States. As of the 2010 Census, the borough's population was 5,730, reflecting a decline of 15 (-0.3%) from the 5,745 counted in the 2000 Census, which had in turn increased by 442 (+8.3%) from the 5,303 counted in the 1990 Census. The borough is an upscale New York City suburb with most houses on lots of at least 15,000 square feet (1,400 m2).
Woodcliff Lake is also the name of the reservoir that lies primarily within the borough, with a small part of it located in neighboring Hillsdale.
It was the world headquarters of Ingersoll Rand until they moved in 2004 and its property was taken over by the North American headquarters of BMW. The borough is also the corporate headquarters of Perillo Tours, which consists of an elaborate Italian revival where Richard Nixon had an office after his Presidency.