Vembanad Lake is the longest lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, and the largest lake in the state of Kerala

Kerala

or Keralam is an Indian state located on the Malabar coast of south-west India. It was created on 1 November 1956 by the States Reorganisation Act by combining various Malayalam speaking regions....

. It is also one of the largest lakes, in India. A lake spanning several districts in the state of Kerala, it is known by different names in different localities viz. Punnamada Lake in Kuttanad

Kuttanad

Kuttanadu is a region in the district of Alappuzha, in the state of Kerala, India, well known for its picturesque vast paddy fields and its geographical peculiarities. It's the region with the lowest altitude in India, and one of the few places in the world where farming is carried out below sea...

, Kochi Lake in Kochi

Kochi

-Places:* Kochi, a city in the state of Kerala, India, formerly known as Cochin* Kingdom of Cochin, a former feudal city-state on Malabar Coast, India** Fort Kochi, one of the three main urban components which constitute the present day city of Kochi, Kerala, India...

. The Port of Kochi is located around two islands (the Willingdon Island

Willingdon Island

Willingdon Island is an island, which forms part of the city of Kochi, in the state of Kerala, India. Much of the present Willingdon Island was claimed from the Lake of Kochi, filling dredged soil around a previously existed, but tiny natural island...

 and Vallarpadam

Vallarpadam

Vallarpadam is one among the group of islands, that form part of the city of Kochi, in the state of Kerala, India. It is situated in the Vembanad_Lake known here as Lake of Kochi and has a population of over 10,000...

) in a portion of this lake known as the Kochi Lake.