Last name Mostovac (Mostovac 
) , all around the world, is a rare cognomen. The family name Mostovac is habitual in Croatia, where it is quite a rare surname, New Zealand, where it is a very rare surname, and Canada. In absolute terms, it is commonest in Croatia, Canada, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Mostovac | Australia, Germany, Canada, New Zealand, Croatia |