The Sittee River is a river in Belize.
Located in central Belize, the mangroves located at the mouth of this river are the tallest ever reported for the Caribbean region and among the tallest anywhere in the entire Neotropics. The mouth of the Sittee River represents the optimal conditions for mangrove development and the forest found there has a high level of structural development. Freshwater flows and sediments carried by the river itself, draining from the Maya Mountains, and tidal flushing from the Caribbean Sea all support this tree growth. The forest at the mouth of the river is composed of three mangrove species: red mangrove (Rhizophora mangle), white mangrove (Laguncularia racemosa), and black mangrove (Avicennia germinans).
In 2001, the arrival of Hurricane Iris caused significant flooding in local communities. Sittee River possesses a population of 312. Only 2 mi (3.2 km) from the river, Sittee River Methodist primary school, a religious public school, suffered significant damage to their library, losing many of their children's books and resources. While it is slowly rebuilding it's book collection, its library remains sparse due to hurricane damages.
Located in Sittee River Village, Serpon Sugar Mill is the ruins of a 19th century sugar refinery which has been designated a park. There is a small general store with camping and a community phone on the main village road.