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is a Town in Warren County, New Jersey, United States. As of the United States 2000 Census, the town population was 2,771. It is the county seat of Warren County.
Belvidere was incorporated as a town by an Act of the New Jersey Legislature on April 7, 1845, from portions of Oxford Township, based on the results of a referendum held that day.
According to the United States Census Bureau, the town has a total area of 1.4 square miles (3.5 km
Dildine Island is located in the Delaware River approximately four miles north of Belvidere.