Boyadhzik is a village in southeastern Bulgaria. It is part of Tundja municipality, Yambol region.
The population is about 1400 people.
The climate is continental, with little influence from the Black Sea and the Mediterranean. It is characterized by mild, snowy winters and hot summers.
All streets in the village are paved and through the village passes the road which connects Nova Zagora to Yambol.
There's a doctor, a dentist, a kindergarten, a primary school, a community center with children dance group, female folk group, boxing club "Aprilets" and FC "Boyadjik 2004.
Boyadjik is the birthplace of Ivan Atanasoff - father of the inventor of the computer John Atanasov. Today in the center there is a memorial to John Atanasov.
The area boasts of beautiful scenery and fresh air. Suitable for eco, wine, historical and cultural tourism.
There are interesting architectural objects, Trachian and Roman settlements from antiquity.
"Kaleto" area is located a few kilometers away from the village, where were found the remains of a fortress, which is believed to have been a Roman legion guarding base. There is a small chapel, where today the annual festival of Boyadjik is held.