Kostadin is a South Slavic masculine given name, a variant of Konstantin (Constantine). It may refer to:Kostadin Adzhov, Bulgarian footballer Kostadin Alakushev, Bulgarian revolutionary in the Internal Macedonian-Adrianople Revolutionary Organization (IMARO) Kostadin Angelov, Bulgarian coach Kostadin Bashov, Bulgarian footballer Kostadin Dyakov, Bulgarian footballer Kostadin Dzhambazov, former Bulgarian footballer Kostadin Gadzhalov, Bulgarian footballer Kostadin Georgiev, Bulgarian footballer Kostadin Hazurov, Bulgarian footballer Kostadin Katsimerski, Bulgarian footballer Kostadin Kostadinov, retired Bulgarian football player Kostadin Markov, Bulgarian footballer Kostadin Stoyanov, Bulgarian footballer Kostadin Varimezov (1918–2002), famous Bulgarian bagpiper (gaidar) Kostadin Velkov, Bulgarian footballer Kostadin Vidolov, Bulgarian former footballer Kostadin Yanchev, Bulgarian former footballer Kostadin Zelenkov, Bulgarian football player
