Yantacaw Brook is a tributary of the Third River in Essex County, New Jersey, United States.

The brook rises in Montclair and then continues into the Third River in Bloomfield, New Jersey and then into Belleville and Nutley, where it enters the Passaic River.

Yanticaw Park, through which the brook flows, is located in Nutley.

The park covers 11.5 acres (4.7 ha) of land.

[1] It has a small pond fed by the stream.