Zadonsky (; masculine), Zadonskaya (; feminine), or Zadonskoye (; neuter) is the name of several rural localities in Rostov Oblast, Russia: Zadonsky, Azovsky District, Rostov Oblast, a khutor in Zadonskoye Rural Settlement of Azovsky District Zadonsky, Bagayevsky District, Rostov Oblast, a settlement in Bagayevskoye Rural Settlement of Bagayevsky District