Aruvai Subayya Krishnamurthy  is a former Indian Revenue Service officer who served as 13th Chief Election Commissioner (C.E.C) of India (February 2004 - May 2005).His main assignment as C.E.C was to oversee the 2004 elections to the Lok Sabha. He was known for his integrity and a polite yet firm fist with which he handled all sensitive assignments throughout his career.
He had earlier served in the Election Commission of India as a commissioner since January 2000.

Krishnamurthy started his career as a probationary officer at the Bank of India (prior to nationalization) at the age of 19. He joined the Indian Revenue Service in the batch of 1963.

He also served as an IMF advisor in Ethiopia and Georgia. As Chief Election Commissioner he was an observer to the elections in Zimbabwe and the U.S Presidential Elections in 2004. 

Post his retirement, he is a board member of various companies and NGOs, most notably, he was the Chairman of Bharatiya Vidya Bhavan, Chennai Kendra. He is the author of the book "Miracles of Democracy", published in August 2008.