Keyport is a borough in northern Monmouth County, in the U.S. state of New Jersey. A waterfront community located on the Raritan Bay in the Raritan Valley region, the borough is a commuter town of New York City in the New York metropolitan area. As of the 2020 United States census, the borough's population was 7,204, a decrease of 36 (−0.5%) from the 2010 census count of 7,240, which in turn reflected reflected a decline of 328 (−4.3%) from the 7,568 counted in the 2000 census. Keyport's nickname is the "Pearl of the Bayshore" or the "Gateway to the Bayshore".

The Aeromarine Plane and Motor Company was an early American aircraft manufacturer founded by Inglis M. Upperçu which operated from 1914 to 1930. From 1928 to 1930 it was known as the Aeromarine-Klemm Corporation.