Bor is a city and the administrative center of the Bor District in eastern Serbia. According to the 2022 census, the city administrative area ha…Bor is a city and the administrative center of the Bor District in eastern Serbia. According to the 2022 census, the city administrative area has a population of 40,845 inhabitants. Bor has one of the largest copper mines in Europe. It has been a mining center since 1904, when a French company began operations there. With 760 residential buildings, it presents the highest ration of urban area to number of citizens in the country, and is one of top-five cities in Serbia by number of buildings.