Cognomen Ostapczuk (Ostapczuk 
, Остапчук 
) , in the world, is a common family name. The surname Ostapczuk is habitual in Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, where it is quite a rare surname, and Russia. Very seldom, Ostapczuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ostapczuk | Poland, United States, United Kingdom, Argentina, Germany |
| Остапчук | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| bronisław ostapczuk PL (b. 1923) |
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bartłomiej ostapczuk PL (b. 1977) |
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| jerzy ostapczuk PL (b. 1974) |
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