Petar Kočić (; 29 June 1877 – 27 August 1916) was a Bosnian Serb writer, activist and politician. Born in rural northwestern Bosnia in the final days of Ottoman rule, Kočić began writing around the turn of the twentieth century, first poetry and then prose. While a university student, he became politically active and began agitating for agrarian reforms within Bosnia and Herzegovina, which had been occupied by Austria-Hungary following the Ottomans' withdrawal in 1878. Other reforms that Kočić demanded were freedom of the press and freedom of assembly, which were denied under Austria-Hungary.