River Plaza is an unincorporated community located within Middletown Township in Monmouth County, New Jersey, United States. It is adjacent to the Navesink River and Shadow Lake.The settlement is mainly made up of small single-family homes on a peninsula between the river and lake, though parts of the community stretch north of the lake. The community's one elementary school, River Plaza Elementary, is located north of the lake on Hubbard Avenue (County Route 12). The other major road in River Plaza, Front Street, carries CR 10 east of Hubbard Avenue and travels to Red Bank via the Hubbards Bridge over the Navesink River.
