Lake Carnegie (New Jersey)

Lake Carnegie is a reservoir that is formed from a dam on the Millstone River, in the far northeastern corner of Princeton, Mercer County, New Jersey. The Delaware and Raritan Canal and its associated tow path are situated along the eastern shore of the lake. Noted businessman and philanthropist Andrew Carnegie donated money for the construction of the lake, which was donated to Princeton University. In 1990, the Lake Carnegie Historic District was listed on the National Register of Historic Places.

The lake, which is privately owned, is used by the university's rowing team, and is home to the US Olympic rowing team. It is, however, available for public use for activities such as ice skating, fishing, and picnicking. Fish species include largemouth bass, carp, pickerel, crappie, channel catfish and occasionally a few rainbow and brown trout that make their way into Carnegie Lake from Stony Brook. Years of pollution have led to a dangerous decrease in the lake's safety levels. Efforts to improve the water quality of Carnegie Lake are ongoing.

The lake would serve as the first true home rink for the Princeton Tigers men's ice hockey team from 1907 until the opening of the Hobey Baker Memorial Rink in 1923.