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. He, along with his contemporaries Semmangudi Srinivasa Iyer and G.N. Balasubramaniam, are referred to as the 20th century male trinity of Carnatic music. He was one of the most highly celebrated carnatic vocalists during the first half of the 20th century. He was renowned for his adept skills at singing kalpana swarams, neraval, and raga alapana. His music continues to be highly regarded today.