Cognomen Omelchuk (Омельчук 
, Omelchuk 
) , across the world, is a common last name. The surname Omelchuk is habitual in Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, where it is quite a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Омельчук | Russia, Belarus, Ukraine, Kazakhstan |
| Omelchuk | Canada, Argentina, Ukraine, Russia, United States |
| irina aleksanderovna omelchuk RU (b. 1963) |
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| oxana omelchuk Belarusian composer, BY (b. 1975) |
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| ekaterina omelchuk researcher (ORCID 0000-0003-0786-9684) |
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