Surname Stupak (Stupak 
, Ступак 
) , around the globe, is a common cognomen. The family name Stupak is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Russia. Not in comparison with a country's population, it is commonest in Ukraine, Russia, and the United States. Much less frequently, Stupak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Stupak | Poland, Canada, United States, Slovakia, Russia |
| Ступак | Kazakhstan, Ukraine, Belarus, Kyrgyzstan, Russia |
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bob stupak American poker player, US (b. 1942) |
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bart stupak American politician, US (b. 1952) |
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| howard d stupak researcher (ORCID 0000-0001-7946-9650) |
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| natalia stupak researcher (ORCID 0000-0002-3422-1018) |
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| inge stupak researcher, ORCID id # 0000-0002-9984-5024 |
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| radosław stupak researcher |
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