Arunachalam R. Lakshmanan (22 March 1942 – 27 August 2020) was a judge of the Supreme Court of India.

He was also appointed Chief Justice of Rajasthan High Court in 2000 and Andhra Pradesh High Court in 2001.

[3] He hailed from the Nagarathar community and his native is Devakottai, Tamil Nadu.

He served as chairman of the Law Commission of India during 2006–2009.

Lakshmanan was representing Tamil Nadu in the Mullai Periyar Panel appointed by the Hon'ble Supreme Court of India.