Matawan is a borough in Monmouth County, in the U.S. state of New Jersey. A historic community located near the Raritan Bay in the much larger Raritan Valley region, the borough is a commuter town of New York City within the New York Metropolitan Area. As of the 2020 United States census, the borough's population was 9,565, an increase of 755 (+8.6%) from the 2010 census count of 8,810, which in turn reflected a decline of 100 (−1.1%) from the 8,910 counted in the 2000 census.

The Raritan Bayshore is a region in central sections in the state of New Jersey. It is the area around Raritan Bay from The Amboys to Sandy Hook, in Middlesex and Monmouth counties, including the towns of Perth Amboy, South Amboy, Sayreville, Old Bridge, Matawan, Aberdeen, Keyport, Union Beach, Hazlet, Keansburg, Middletown, Atlantic Highlands, and Highlands. It is the northernmost part of the Jersey Shore, located just south of New York City. At Keansburg is a traditional amusement park while at Sandy Hook are found ocean beaches. The Sadowski Parkway beach area in Perth Amboy, which lies at the mouth of the Raritan River, was deemed the "Riviera of New Jersey" by local government. In recent years many of the beaches on the Bayshore area have been rediscovered and upgraded.