Keasbey is a census-designated place and unincorporated community in Woodbridge Township, Middlesex County, New Jersey, United States. It is located in the western outskirts of adjacent Perth Amboy. As of the 2020 census, the CDP's population was 3,027. Many Hispanic/ Latino families have relocated from Perth Amboy to Keasbey. Keasbey was originally known as "Florida Grove" due to its picnic areas and beaches on the Raritan River.