Family name Kusok (Kusok 
) , globally, is a very rare cognomen. The surname Kusok is characteristic of Argentina, where it is a very rare surname, Ukraine, where it is an extremely rare surname, and Russia. Not in comparison with a country's population, it is commonest in Argentina, the United States, and India. Very seldom, Kusok is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kusok | Philippines, Russia, India, Argentina, United States |