Drobnjak is a Souts Slavic surname. Notable people with the surname include:
Anto Drobnjak, Montenegrin football player Branislav Drobnjak, Montenegrin football player Dragiša Drobnjak, Slovenian basketball player
Predrag Drobnjak, Montenegrin basketball player Vladimir Drobnjak, Croatian diplomat
See also
Drobnjak, Montenegro, a region in Montenegro Serbian name for Dromjak, a village in Hani i Elezit, Kosovo