European University Viadrina Frankfurt (Oder) (German: Europa-Universität Viadrina Frankfurt (Oder)) is a university located at Frankfurt (Oder) in Brandenburg, Germany. It is also known as the University of Frankfurt (Oder). The city is on the Oder River, which marks the border between Germany and Poland. With 5,200 students — around 1,000 of whom come from Poland — and some 160 teaching staff, the Viadrina is one of Germany's smallest universities (only the University of Erfurt and Jacobs University Bremen have fewer students).

Frankfurt (Oder), also known as Frankfurt an der Oder (German: [ˈfʁaŋkfʊʁt ʔan deːɐ̯ ˈʔoːdɐ]; Central Marchian: Frankfort an de Oder; lit. Frankfurt on the Oder) is the fourth-largest city in the German state of Brandenburg after Potsdam, Cottbus and Brandenburg an der Havel. With around 58,000 inhabitants, it is the largest German city on the Oder River, and one of the easternmost cities in Germany. Frankfurt sits on the western bank of the Oder, opposite the Polish town of Słubice, which was a part of Frankfurt until 1945, and called Dammvorstadt until then. The city is located about 80 kilometres (50 mi) east of Berlin, in the south of the historical region Lubusz Land. Within Frankfurt's city limits lies the recreational area Lake Helenesee.