Glavaš (Serbian Cyrillic: Главаш) is a Serbian and Croatian family name.
People with the surname include:
- Luka Glavas (1985), Australian-born footballer
- Branimir Glavaš (1956), Croatian former major general and politician
- Marin Glavaš (born 1992), Croatian footballer
- Radoslav Glavaš (senior) (1863-1913), Herzegovinian Croat Franciscan
- Radoslav Glavaš (junior) (1909-1945), Herzegovinian Croat Franciscan
- Stanoje Glavaš (1763-1815), Serbian hajduk and hero
- Vlatko Glavaš (1962), Bosnian footballer