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.

He defeated the Indian National Congress candidate in Tiruvannamalai Assembly constituency by-election in 1963 on DMK ticket.

P U Shanmugam was born in a Tuluva Vellala Mudaliar family of Tiruvannamalai in 1924.

He was SSLC educated at Municipal High School in Tiruvannamalai.

He also contested from Melmalayanur constituency and lost in 1989 election as a candidate of All India Anna Dravida Munnetra Kazhagam (AIADMK) Janaki faction.