Subbiah Muthiah, (13 April 1930 – 20 April 2019), was an Indian writer, journalist, cartographer, amateur historian and heritage activist known for his writings on the political and cultural history of Chennai city.
He was the founder of the fortnightly newspaper Madras Musings and the principal organizer of the annual Madras Day celebrations.
Muthiah was also the founder-President of the Madras Book Club.