P U Shanmugam, affectionately called as Paa Vuu Saa (15 August 1924 - 11 April 2007) was an Indian politician and former minister of Tamil Nadu for Internal affairs, former minister of Public works, former minister of public health and various other portfolios on various tenures. The Dravidian veteran also worked as the Organisation Secretary of DMK and the 3rd General Secretary of AIADMK. He defeated the Indian National Congress candidate in Tiruvannamalai Assembly constituency by-election in 1963 on DMK ticket.