Kostadin is a variant of Konstantin (Constantine). It may refer to:

• Kostadin Adzhov (born 1991), Bulgarian footballer
• Kostadin Alakushev, Bulgarian revolutionary in the Internal Macedonian-Adrianople Revolutionary Organization (IMARO)
• Kostadin Angelov (born 1973), Bulgarian coach
• Kostadin Bashov (born 1982), Bulgarian footballer
• Kostadin Dyakov (born 1985), Bulgarian footballer
• Kostadin Dzhambazov (born 1980), former Bulgarian footballer
• Kostadin Gadzhalov (born 1989), Bulgarian footballer
• Kostadin Georgiev (born 1986), Bulgarian footballer
• Kostadin Hazurov (born 1985), Bulgarian footballer
• Kostadin Kostadinov (born 1959), retired Bulgarian football player
• Kostadin Kostadinov (professor) (born 1955), Bulgarian scientist
• Kostadin Markov (born 1979), Bulgarian footballer
• Kostadin Stoyanov (born 1986), Bulgarian footballer
• Kostadin Varimezov (1918–2002), famous Bulgarian bagpiper (gaidar)
• Kostadin Velkov (born 1989), Bulgarian footballer
• Kostadin Vidolov (born 1970), Bulgarian former footballer
• Kostadin Yanchev (born 1963), Bulgarian former footballer

• Kostadinite

Name list

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