Family name Koporc (Koporc 
) , in the world, is a very rare cognomen. The family name Koporc is habitual in Slovenia, where it is a rare surname, Croatia, and the United States, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Koporc | Croatia, Slovenia, United States |
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srečko koporc Slovene composer and conductor, SI (b. 1900) |
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| leon koporc 29.06.1926 / 20.10.2003 1926, SI (b. 1926) |
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| andrej koporc SI |
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Al, Joseph, Nancee, Edward, Markela, Michael, Suzanne, Andreja, Colleen, Kalleen, Raymond, Richard, Rudolph, Heather, Vanessa, Vincent, Kimberly, Patricia, Randolph, Zvonimir, Amanda, Stella, Steven, Marcia, Amy, Kim, Joy, Mike, Alan, Amie, Robi, Lynn, Nada, Alexander, Neil, Maria, Alice, Agnes, Brian, Randy, James, Julia, Nancy, Edwin, Eric, and Christine