The Top 5 Longest Underground Railway Systems

  Railway Number of Stations Total Length First Opened
1 London 267 392 km 1863
2 New York 468 371 km 1904
3 Moscow 160 262 km 1935
4 Paris 297 201 km 1900
5 Mexico City 164 178 km 1969
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Tags: Transportation, Top 5 Longest

Sources:  Various

List Notes: 
Longest Underground Railway Systems

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