Atlantic Highlands was incorporated as a borough by an act of the New Jersey Legislature on February 28, 1887, from portions of Middletown Township, based on the results of a referendum held that day. The borough was reincorporated on September 1, 1891. Atlantic Highlands contains Mount Mitchill, the highest point on the eastern seaboard south of Maine, rising 266 feet (81 m) above sea level. The borough's name comes from its location overlooking the Atlantic Ocean.
Source: Snyder, John P. The Story of New Jersey's Civil Boundaries: 1606-1968, Bureau of Geology and Topography; Trenton, New Jersey; 1969. p. 178.