The Saint Petersburg Metro (Russian: Петербургский метрополитен, romanized: Peterburgskiy metropoliten) 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.

Formerly known as the Order of Lenin Leningrad Metro named after V. I. Lenin (Ленинградский Ордена Ленина Метрополитен имени В. И. Ленина), the system exhibits many typical Soviet designs and features exquisite decorations and artwork making it one of the most attractive and elegant metros in the world. Due to the city's unique geology, the Saint Petersburg Metro is also one of the deepest metro systems in the world and the deepest by the average depth of all the stations. The system's deepest station, Admiralteyskaya, is 86 metres (282 ft) below ground.

The network consists of 5 lines with a total length of 124 kilometres (77 mi). It has 72 stations including 7 transfer points. Serving about 2 million passengers daily, it is the 26th busiest metro system in the world.