Kolleru Lake is one of the largest freshwater lakes in India located in state of Andhra Pradesh and forms the largest shallow freshwater lake in Asia. 15 kilometers away from the Eluru and 65 km from Rajamahendravaram, the lake is located between the Krishna and Godavari deltas. Kolleru Lake is located in Eluru district. The lake is fed directly by water from the seasonal Budameru and Tammileru streams, and is connected to the Krishna and Godavari irrigation systems by over 67 major and minor irrigation canals. This lake is a major tourist attraction. Many birds migrate here in winter, such as Siberian crane, ibis, and painted storks. The lake was an important habitat for an estimated 20 million resident and migratory birds, including the grey or spot-billed pelican. The lake was declared as a wildlife sanctuary in November 1999 under India's Wildlife Protection Act of 1972, and designated a wetland of international importance in November 2002 under the international Ramsar Convention. The wildlife sanctuary covers an area of 308 km2.

Eluru district is a district in coastal Andhra Region in the Indian state of Andhra Pradesh. With Eluru as its administrative headquarters, it was proposed on 26 January 2022 to become one of the resultant twenty six districts in the state once a final notification is issued by the government of Andhra Pradesh. It is formed from Eluru revenue division and Jangareddygudem revenue division from West Godavari district and Nuzvid revenue division from Krishna district.