Union Beach was formed as a borough by an act of the New Jersey Legislature on March 16, 1925, from portions of Raritan Township (now Hazlet), based on the results of a referendum held on April 16, 1925. A farm in the future borough was owned by the Poole family since the days of the American Revolutionary War. Following the development of the Central Railroad of New Jersey, the Poole Farm became the site of the Union Subdivision in 1908, while an area that had been called East Point Beach Estates was renamed Union Beach by developer Charles Carr in 1920.