Boyadzhik (Bulgarian: Бояджик) is a village in Tundzha Municipality of Yambol Province, Bulgaria. Situated 22 km west of the city of Yambol, and 8 km southwest of the joint United States-Bulgarian Bezmer Air Base, at an elevation 153 m. Population 1,514. It is the birthplace of Ivan Atanasov, the father of John Vincent Atanasoff.