Line 1 of the Saint Petersburg Metro, also known as Kirovsko-Vyborgskaya Line or Red Line, is the oldest rapid transit line in Saint Petersburg, Russia, opened in 1955, which connects Kirovsky and Vyborgsky districts of the city. The original stations are very beautiful and elaborately decorated, especially Avtovo and Narvskaya. The line connects four out of five Saint Petersburg's main railway stations. In 1995, a flooding occurred in a tunnel between Lesnaya and Ploschad Muzhestva stations and, for nine years, the line was separated into two independent segments. The line is also one of the two lines in the network to feature shallow stations, the other being the Nevsko-Vasileostrovskaya Line.

The Saint Petersburg Metro is a rapid transit system in Saint Petersburg, Russia. Construction began in early 1941, but was put on hold due to World War II and the subsequent Siege of Leningrad, during which the constructed stations were used as bomb shelters. It was finally opened on 15 November 1955.