Surname Костиц (Kostic 
, Костиц 
, Kostits 
) , all around the world, is a common family name. The surname Костиц is characteristic of Southern Europe, particularly Serbia, where it is a widespread surname, Montenegro, where it is a common surname, and Bosnia and Herzegovina, where it is quite a common surname (explore the name in all countries). Much less frequently, Костиц is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kostic | Germany, Montenegro, Austria, Serbia, Bosnia and Herzegovina |
| Костиц | Russia, Ukraine |
| Kostits | Greece, Ukraine |