Vasilije "Vasa" Pelagić (Serbian Cyrillic: Василије "Васа" Пелагић; 1833 – 25 January 1899) was a Bosnian Serb writer, physician, educator, clergyman, nationalist and a proponent of utopian socialism among the Serbs in the second half of the nineteenth century. Today he is considered one of the first theoreticians of physical education in the Balkans. He is also remembered as a revolutionary democrat and one of the leaders of the national liberation and socialist movement in Serbia and Bosnia-Herzegovina.