Josip Runjanin or Josif Runjanin (Serbian Cyrillic: Јосиф Руњанин; 8 December 1821–2 February 1878) was a Serb composer and soldier from the Austrian Empire. He is best known for composing the melody of the Croatian national anthem and of the Serbian patriotic song "Rado Srbin ide u Vojnike" (Gladly will the Serb Enlist in the Army). He was lieutenant-colonel in the Habsburg Army.