Karamana is a river flowing through the city of Thiruvananthapuram in Kerala, India. The river starts near the southern tip of the Western Ghats at Agastyar Koodam. The river flows 66 km westward and merges with the Arabian Sea at Panathura near Kovalam. The river gets its name from Karamana, a suburb of Thiruvananthapuram city, Aryanad through which it flows.
The catchment area is mostly forested, command area is under mixed dry land crops such as coconut, tapioca, pepper, plantain, rice, etc