Cadwalader Park is a city park located in Trenton, Mercer County, New Jersey, United States. The nearly 100 acres (0.40 km2) green space is Trenton's oldest park. It is named for Thomas Cadwalader, who lived for a while near Trenton where he became the chief burgess in 1746. Trenton's "central park" was designed by Frederick Law Olmsted. At one time the park had a train stop along the long gone Belvidere-Delaware Railroad.