Last name Koporec (Koporec 
) , globally, is a rare surname. The last name Koporec is characteristic of Slovakia, where it is quite a rare surname, Slovenia, and Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Koporec | Slovakia, Czechia, Slovenia, United States |
| jožef koporec SI (b. 1932) |
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| gregor koporec researcher (ORCID 0000-0001-5426-5686), SI |
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| jože koporec SI |
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