S. Xavier (1920 - 6 December 2009) was a lawyer, trade union leader and Swatantra party politician from the Indian state of Tamil Nadu.
He served as the Member of Lok Sabha for Tirunelveli from 1967 to 1971 and expired on 6 December 2009.
He studied law and graduated as a lawyer in 1952 and started practising from 1953 onwards.
Xavier lead various trade unions and worker's organisations in Madras state.
Xavier took an active interest in politics and joined the Swatantra party established by C. Rajagopalachari in 1959.