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