K.S. Vasan was an Indian communist politician and trade unionist from the Kolar Gold Fields. who organized the first leftist trade union in the gold fields during the 1940s. Vasan, then a young man, arrived at the Kolar Gold Fields from Madras and went on to build a union that mobilized labourers from thirteen different mining companies. He was arrested as he led a workers revolt against the British authorities. As of 1963, Vasan was the president of the Mysore Mine Workers Union, which was affiliated with the All India Trade Union Congress (AITUC).