Odeleite (also known as Ribeira de Odeleite) is a river located in the municipality of Castro Marim, Algarve, Portugal and a right tributary of the Guadiana. It originates in the mountains of the Serra do Caldeirão in Loulé and flows through the municipalities São Brás de Alportel, Tavira, Alcoutim and Castro Marim, where it reaches the Guadiana. The river shares its names with the village of Odeleite, in Castro Marim municipality, located just to the north of the Odeleite dam.
The name Odeleite may have originated from the Arabic term wdi al-laban, which means river of milk. According to historical accounts, during the period of Arab period, the river was known as Leite and had a higher water volume compared to present times.
