- Caroni Plain: This is the largest plain in Trinidad, located in the central part of the island. It is known for its fertile soils and is a major agricultural area.
- Nariva Plain: The Nariva Plain is situated in the southeastern region of Trinidad. It is known for its swampy areas, mangroves, and wildlife sanctuaries.
- Oropouche Plain: The Oropouche Plain is located in the southwestern part of Trinidad. It is a gently sloping plain with hills and valleys. It is also an important agricultural area.