Agustín Candido Tellería Mendizábal (1884-1939) was a Spanish Basque politician and entrepreneur. Politically he supported the Traditionalist cause, mostly as a Carlist and for some time as a Mellista; since 1933 he was a member of the party provincial executive in Gipuzkoa. He is known chiefly as one of key people behind the anti-Republican conspiracy in the vasco-navarrese area in the spring of 1936; thanks to his position of a businessman and army supplier, he procured arms and munitions for the rebels. In 1937 he was for 5 months the provincial Gipuzkoan leader of the Francoist state party, the FET y de las JONS, but was shortly ousted as a zealous Carlist, non-compliant with the official regime ideology.