Cognomen Koczan (Koczan 
, Коцан 
) , throughout the world, is quite a rare family name. The surname Koczan is characteristic of Eastern Europe, particularly Hungary, where it is quite a rare surname, Ukraine, and Poland, where it is a rare surname. Much less frequently, Koczan is the forename as well as the last name.
| kazimierz koczan Polish Righteous Among the Nations, PL (b. 1902) |
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| weronika koczan Polish Righteous Among the Nations, PL (b. 1903) |
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| piotr koczan volleyball player (1955-2017), PL (b. 1955) |
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| dirk koczan researcher |
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| leopold koczan Polish mathematician |
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| jj koczan American vocalist, journalist and author, US (b. 1981) |
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| agata koczan PL (b. 1986) |
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