Globally, Калищук (Калищук 
, Kaliscuk 
, Kalischuk 
) is an extremely rare unknown gender first name. Much more frequently, Калищук is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Калищук | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Kaliscuk | Germany, Croatia, United States |
| Kalischuk | Canada, United States, Germany, Ukraine |
| Kalishchuk | Russia, United States, Ukraine |