O. V. Alagesan
 Ozhalur Viswanatha Mudaliar Alagesan (Tamil: ஒழலூர் விஸ்வநாத முதலியார் அழககேசன்) (6 September 1911 – 3 January 1992) was an Indian politician and freedom fighter from the Indian state of Tamil Nadu. He served as a member of the Indian Parliament from 1951 to 1957 1962 to 1967 and from 1971 to 1979.