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. Both Yantacaw Brook and the Third River were referred to by the Lenape people as Yantokah or Yantacaw.

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

Yantacaw Brook Park
Location	Montclair, New Jersey
Coordinates	40°50′50″N 74°10′43″W / 40.847093°N 74.178658°W / 40.847093; -74.178658
Area	11.5 acres (4.7 ha)
Operated by	Montclair Parks and Recreation

Yantacaw Brook Park is a town operated park located in Montclair. The park covers 11.5 acres (4.7 ha) of land. It has a small pond fed by the stream.

• Yantacaw Brook Park
• 
  View of west end of the park where a small bridge goes over the Yantacaw Brook before flowing into the pond
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  The dam which helps keep the pond full
• 
  Edge of the pond

• List of rivers of New Jersey

40°50′24″N 74°11′24″W / 40.83999°N 74.190040°W / 40.83999; -74.190040