SUMMIT, a city of Union county, New Jersey, U.S.A., in the north-east of the state, about 21 m. W. of New York City. Pop. (1900) 5302, of whom 1397 were foreign-born; (1905) 6845; (1910) 7500. It is served by the Morris & Essex and the Passaic & Delaware divisions of Delaware, Lackawanna & Western railroad, and by the Rahway Valley railroad extending to Roselle, 9 m. distant. Summit is picturesquely situated on the crest of a ridge called Second Mountain, with a mean elevation of 450 ft. It is a residential suburb of New York, and attracts a number of summer residents. Among its institutions are a public library (1874), a home for blind children, the Overlook hospital and the Kent Place school (1894) for girls. On Hobart -Hill there is a monument marking the site of a beacon light and a signal gun used during the War of Independence. Summit was incorporated as a township in 1869 from parts of the townships at Springfield and New Providence, and was chartered as a city in 1899.