According to the 2011 census results, Serbs was the most populous ethnic group residing in Surdulica, Pinja.
According to the 2011 census results, the municipality of Surdulica has a population of 20,319 inhabitants. Serbs 79.89% Surdulica (Serbian Cyrillic: ) is a town and municipality located in the Pcinja District of southern Serbia. 
