Madurai Mani Iyer (Tamil: மதுரை மணி ஐயர்; 25 October 1912 – 8 June 1968) was an Indian Carnatic music singer, who was famous for his unique style.

His father, a Sub-court Clerk, was the brother of the famous Vidwan Pushpavanam, who was a great classical musician himself.

Iyer's prodigious talents were recognized early in his age as he received various honours from dignitaries of that time.

Though a school drop out, Mani Iyer mastered this language and an anecdote goes that he would trudge from his house in Mylapore all the way to the Connemara Library to pick up books in English.

A compulsive listener of both the English and the Tamil news, Mani Iyer was a keen observer of politics too.