Jovan Simonov Plamenac (Serbian Cyrillic: Јован Симонов Пламенац; 1873 – 1944) was a Montenegrin and Yugoslav politician. Starting out as a prominent leader of the True People's Party in the Principality of Montenegro, state that would soon transform into a kingdom, Plamenac was a staunch supporter of the country's monarch Prince Nikola Petrović-Njegoš who changed his role to king in 1910. As World War I broke out and King Nikola secretly fled the country after it got invaded by the Central powers, Plamenac denounced the king.