Family name Koprek (Koprek 
) , throughout the world, is quite a rare surname. The cognomen Koprek is habitual in Croatia, where it is quite a rare surname, Slovenia, where it is a rare surname, and Poland. In absolute terms, it is the most numerous in Germany, Croatia, and Poland. Also, Koprek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Koprek | Germany, Croatia, Indonesia, United States, Poland |
| manfred koprek Polish association football player, PL (b. 1943) |
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| ivan koprek HR (b. 1954) |
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| katica s. katarina koprek professor at Zagreb University |
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| ksenija koprek Croatian boxer, HR (b. 1983) |
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