Yiannis Pharmakis or Ioannis Farmakis () (1772–1821), born in Vlasti, Macedonia (Greece), was a Greek revolutionary leader of the Greek War of Independence, active in Wallachia and Moldavia. Initially a commander of the Princely guard in Bucharest, Pharmakis joined the Philikí Etaireía movement and became an aide to Alexander Ypsilantis, establishing a permanent link with the non-Greek Oltenian Pandurs led by Tudor Vladimirescu. He and Giorgakis Olympios reached an agreement with Tudor in the early months of 1821, but, since the relation between the two factions soured as an effect of Russian and Ottoman Empire intervention, the two (joined by Dimitrie Macedonski) decided to arrest Vladimirescu (who was to be executed on June 7). As the insurgency crumbled under Turkish attacks, Pharmakis