Population (people): 8,851,080
Number of stations: 195
Length (km): 227
Riders per annum (billions): 1.685
Number of lines: 12
The Mexico City Metro is a metro system that serves the metropolitan area of Mexico City, including some municipalities in Mexico State. It is the second largest metro system in North America after the New York City Subway. In 2012, the system served 1.609 billion passengers, placing it as the eighth highest ridership in the world.