The Neyyar River is 56 km long river which flows through the

Thiruvananthapuram district Thiruvananthapuram District () is the List of districts of Kerala, southernmost district in the States and union territories of India, Indian state of Kerala. The district was created in 1949, with its headquarters in the city of Thiruvananth ...

Kerala Kerala ( , ) is a States and union territories of India, state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

. It flows from the Agastya Mala (''Agastyarkoodam'') in the Western Ghats. The town

Neyyattinkara Neyyattinkara is a municipal town in Thiruvananthapuram district, Kerala, India. It also serves as the administrative headquarters of Neyyattinkara taluk. Nestled along the banks of the Neyyar River, one of the district's principal rivers, the ...

, is situated on the banks of the river, is named after this river. The river flows through the

Neyyar wildlife sanctuary The Neyyar Wildlife Sanctuary in the southern state of Kerala in India is spread over the southeast corner of the Western Ghats, and covers a total area of . It is located between 77° 8’ to 77° 17’ east longitude and 8° 29’ to 8° 37 ...

and into the Neyyar resorvoir. It then flows towards the west through the settlements of Kallikkad,

Kattakkada Kattakada is a town in Thiruvananthapuram district of Kerala. It is situated 13 km north of Neyyattinkara town, 18 km south of Nedumangad town and 20 km east of the Capital City, Thiruvananthapuram. There is also a Tehsil A t ...

, Ottashekharamangalam, Mandapathinkavadu, Keezharoor, Perumkadavilla, Aruvipuram, Neyyantinkara and Thirupuram. The river then empties into the

Arabian Sea The Arabian Sea () is a region of sea in the northern Indian Ocean, bounded on the west by the Arabian Peninsula, Gulf of Aden and Guardafui Channel, on the northwest by Gulf of Oman and Iran, on the north by Pakistan, on the east by India, and ...

at the Poovar estuary. Tributaries include the ''Kallar'', ''Mullayar'', and the ''Karavaliyar''. It has several small canals along the river and the Neyyar Irrigation Project, " Neyyar Dam", is situated in this river. A safari park is located near the river. Neyyar river has been severely affected by

sand mining Sand mining is the extraction of sand, mainly through an open pit (or sand pit) but sometimes mined from beaches and inland dunes or dredged from ocean and river beds. Sand is often used in manufacturing, for example as an abrasive or in conc ...

. The catchment area is mostly forested, command area is under mixed dry land crops such as coconut, tapioca, pepper, plantain, rice, etc.Keralapages.org Neyyar
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References

Rivers of Thiruvananthapuram district {{Kerala-river-stub