Keasbey (pronounced "KAYS-bee"[5]) is a census-designated place[6] (CDP) and unincorporated community in Woodbridge Township, Middlesex County, New Jersey, United States.

[8] Keasbey was originally known as "Florida Grove"[9][10] due to its picnic areas and beaches on the Raritan River.

The community is named after the Keasbey family, whose home in Morristown is now Macculloch Hall, a museum.

Keasbey is in northeastern Middlesex County, occupying the southern end of Woodbridge Township.

The Garden State Parkway and the Route 440 freeway intersect in Keasbey.