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Updated October 10, 2025 | Infoplease Staff Information

Subways are the lifelines of major cities, moving millions of people quickly and efficiently through urban centers. From the historic tunnels of London to the massive networks of Moscow and Tokyo, these underground systems represent engineering and logistical marvels.

The Top 10 Largest Subway Systems in the World.

1. Moscow Metro

Opened: 1935

Length: 340 km

Overview: Moscow’s subway is known for its ornate, palace-like stations and impressive reliability. It is one of the busiest and most efficient metro systems in the world.

2. Tokyo Metro

Opened: 1927

Length: 281+ km

Overview: Tokyo’s vast underground system connects one of the world’s largest urban populations. Known for punctuality and cleanliness, it handles millions of passengers daily.

3. Seoul Metro

Opened: 1974

Length: 278+ km

Overview: Seoul’s subway system is a model of modern urban transit, featuring high-speed trains, advanced technology, and wide coverage across South Korea’s capital.

4. Mexico City Metro

Opened: 1969

Length: 202 km

Overview: As one of the largest systems in Latin America, Mexico City’s metro is known for its affordability and colorful station symbols that help riders navigate the network.

5. New York City Subway

Opened: 1904

Length: 371 km

Overview: One of the oldest and most extensive systems in the world, the NYC subway runs 24 hours a day and serves all five boroughs, connecting millions of commuters daily.

6. Paris Metro

Opened: 1900

Length: 211 km

Overview: Famous for its Art Nouveau entrances and dense network, the Paris Metro remains a symbol of efficiency and accessibility in urban transport.

7. Osaka Metro

Opened: 1933

Length: 114 km

Overview: Japan’s second-largest city operates a busy, clean, and highly reliable system that integrates seamlessly with other regional train services.

8. London Underground

Opened: 1863

Length: 415 km

Overview: The world’s oldest subway, often called “the Tube,” still stands as a key part of London’s identity and infrastructure, spanning over 250 stations.

9. Hong Kong MTR

Opened: 1979

Length: 82 km

Overview: Known for its speed and efficiency, the MTR is among the most profitable subway systems in the world, with punctual service and smart-card integration.

10. St. Petersburg Metro

Opened: 1955

Length: 110 km

Overview: Famous for its deep, elaborately decorated stations, the St. Petersburg Metro reflects both function and elegance beneath Russia’s cultural capital.

People Also Ask

Which city has the largest subway system in the world?

Moscow ranks first by ridership, while London and New York are among the largest by total track length.

What is the oldest subway system?

The London Underground, which opened in 1863, is the oldest subway system in the world.

Which subway system is the busiest?

The Moscow Metro and Tokyo Metro consistently rank as the busiest, each serving billions of passengers annually.

Which subway system is the longest?

The London Underground and New York City Subway are among the longest networks by total track length.

 

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