Măcin is located in the north-western part of the Dobrudja region, in Tulcea County. The city is located at the intersection of the DN22 (E87) and DN22D national roads. The DN22 road links it to the Romanian capital, Bucharest (230 km to the West, via Brăila) and to cities of Isaccea and Tulcea (to the East). The DN22D road connects Măcin through a southern route with Tulcea and Constanţa. According to the 2011 census, the population numbered 7,666 inhabitants, composed of 91.46% Romanians, 4.8% Roma, 2.92% Turks and 0.37% Russian Lipovans.
The town is located on an ancient Celtic settlement, named Arrubium. It was then included in the Getic polities of Rhemaxos and Zyraxes, then conquered by the Roman Empire, which stationed a cavalry unit in this place between 99 and 241 AD. The ruins of the old Roman fortifications, could be seen today on the top of “Cetate” Hill. Part of the Bulgarian, Byzantine and later Ottoman Empire, it was included for some time in the Wallachian and Moldavian voivodates.