Surname Kostric (Kostric 
, Костриц 
) , all over the world, is a rare family name. The last name Kostric is habitual in Slovenia, where it is quite a rare surname, Belarus, where it is a rare surname, and Croatia, where it is a very rare surname. In absolute terms, it is the most numerous in Slovenia, Russia, and Belarus. Very seldom, Kostric is the forename as well as the last name.