Dragotin Lončar (November 5, 1876 – July 29, 1954) was a Slovenian historian, editor, and Social Democratic politician. He was born in Selo near Lukovica pri Domžalah in Upper Carniola and baptized Carl Lonzhar. After graduating from the State Gymnasium in Ljubljana, he studied history at the Charles University in Prague, graduating in 1904. In Prague, he joined the circle of young Slovene left-wing intellectuals that became influenced by the political and social thought of Tomáš Garrigue Masaryk, which included figures such as Anton Dermota and Josip Ferfolja. After returning to the Slovene L