All over the world, Kostadin (Костадин 
, Kostadin 
, Костадін ) is a common masculine first name. The forename Kostadin is characteristic of Bulgaria, where it is a common boy's name, North Macedonia, where it is quite a common masculine name, and Greece, where it is quite a rare boy's name. Likewise, Kostadin is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Костадин | Bulgaria, Russia, Ukraine |
| Kostadin | Serbia, Greece, Bulgaria, Romania, North Macedonia |
| Костадін | Ukraine |
| קוסטדין | Israel |
Constantine, Konstantin, Канстанцін, Константин, Костянтин, قسطنطين, and كونستانتين
| kostadin petrovič valʹov BG (b. 1790) |
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kostadin nikolov GR (b. 1868) |
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| kostadin popgutov GR (b. 1846) |
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| kostadin mastalarkov Bulgarian revolutionary, GR (b. 1867) |
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| kostadin kirliev GR (b. 1882) |
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| kostadin dyrilgerov cyclist, BG (b. 1898) |
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| kostadin poppandov MK (b. 1897) |
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| kostadin kostov bulgarian footballer (b. 1920) |
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| kostadin georgiev Bulgarian footballer and manager (b. 1922) |
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| kostadin stoĭchev (b. 1916) |
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kostadin zmiyarov bulgarian revolutionary, MK |
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kostadin shulev MK |
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kostadin kostadinov Macedonian politician (b. 1990) |
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kostadin mishev MK |
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| kostadin tilev (born 1942), BG (b. 1942) |
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