Tamil Nadu Electricity Board (abbreviated as TNEB) is a power generation and distribution company owned by Government of Tamil Nadu, India.

[3] It is the largest State Electricity Board (SEB) in the country in terms of number of consumers (30.75 million as of 31 March 2020).

Later it was renamed Tamil Nadu Electricity Board.

In October 2008, the Government of Tamil Nadu decided to divide TNEB into two subsidiaries.

On 1 November 2010, TNEB Limited became a holding company with two subsidiaries, Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO), responsible for power generation, and Tamil Nadu Transmission Corporation Limited (TANTRANSCO), responsible for power transmission.