Rostov-on-Don is a port city and the administrative centre of Rostov Oblast and the Southern Federal District of Russia. It lies in the southeastern part of the East European Plain on the Don River, 32 kilometers (20 mi) from the Sea of Azov, directly north of the North Caucasus. The southwestern suburbs of the city lie above the Don river delta. Rostov-on-Don has a population of over one million people and is an important cultural centre of Southern Russia.

Rostov is a town in Yaroslavl Oblast, Russia, one of the oldest in the country and a tourist center of the Golden Ring. It is located on the shores of Lake Nero, 202 kilometers (126 mi) northeast of Moscow. Population: 30,406 (2021 Census); 31,792 (2010 Russian census); 34,141 (2002 Census); 35,707 (1989 Soviet census).