As of March 24, 2018
| Rank | Country | City | Distance | Area |
| 1st | Japan | Tokyo-Yokohama | 3995.6km | PASMO Area in 2010, Ryutetsu |
| 2nd | USA | New York | 2519.9km | Long Island, Metro North, Staten Island, New York City Subway, NJ Transit LRT, PATH, NJ Transit Rail |
| 3rd | Japan | Osaka | 1977.9km | PiTaPa Area in 2010(except for Wadamisaki Line and Eastern part of Aoyama-cho), Hankai Line, Tsuruga～Ohmi-Shiotsu |
| 4th | Germany | Rhine-Ruhr | 1366.32km | Rhine-Ruhr S-Bahn, Bonn Tram,Wuppertaler Schwebebahn, Trams in Bochum/Gelsenkirchen, Trams in Duisburg, Trams in Essen, Dortmund Stadtbahn, Trams in Düsseldorf, Cologne Stadtbahn, Trams in Mülheim/Oberhausen, Trams in Krefeld |
| 5th | India | Kolkata | 1256.39km | Kolkata Suburban Railway, Kolkata Metro, Trams in Kolkata |
| 6th | S.Korea | Seoul-Incheon | 1113.2.km | KORAIL, Seoul Metro, Incheon Metro, Line 9, Airport Railroad, Shin-Bundang Line, Gyong-gi Railroad, Yongin Rapid Transit |
| 7th | USA | Chicago | 1097.3km | Metra, Chicago "L", South Shore Line, Kenosha Transit, Chicago Airport System |
| 8th | Japan | Nagoya | 1062.9km | TOICA Area(West of Hamamatsu) in 2010, Manaca Area, Kintetsu(North part of Uji-Yamada, East part of Higashi-Aoyama) |
| 9th | Spain | Barcelona | 984.6km | Barcelona Metro, Rodalies de Catalunya, Barcelona–Vallès Line, Llobregat–Anoia Line, Trambaix, Trambesòs |
| 10th | France | Paris | 935.1km | Paris Metro, RER, Tramways in Île-de-France |
| 11th | Austria | Vienna | 927.6km | Vienna U-Bahn, Badner Bahn, Trams in Vienna, Vienna S-Bahn |
| 12th | Italy | Rome | 898.3km | FL lines, Rome Metro, Rome–Lido railway, Rome–Civitacastellana–Viterbo railway, Trams in Rome |
| 13th | Argentina | Buenos Aires | 831.3km | Buenos Aires Underground, Belgrano Norte Line, Belgrano Sur Line, Mitre Line, Roca Line, San Martín Line, Sarmiento Line, Urquiza Line |
| 14th | Australia | Sydney | 827.8km | CityRail, Transdev Sydney |
| 15th | Norway | Oslo | 769.4km | Oslo Metro, Bane NOR, Sporveien |
| 16th | USA | Boston | 769km | MBTA Subway, MBTA Commuter Rail |
| 17th | Germany | Berlin | 723.9km | Berlin U-Bahn, Berlin S-Bahn, Berliner Verkehrsbetriebe, Trams in Potsdam, Strausberg Railway, Schöneiche-Rüdersdorf Tramway, Woltersdorf Tramway |
| 18th | China | Shanghai | 672.781km | Shanghai Metro, Zhangjiang Tram, Jinshan Railway |
| 19th | UK | London | 667.5km | London Underground, Docklands Light Railway, London Overground, TfL Rail, Tramlink |
| 20th | Spain | Madrid | 663km | Madrid Metro, Cercanías Madrid |
| 21st | Japan | Fukuoka-Kitakyusyu | 640.2km | |
| 22nd | Canada | Toronto | 636.7km | Toronto Subway, Link Train, Toronto streetcar system, Union Pearson Express, GO Transit |
| 23rd | USA | Washington DC | 634km | Washington Metro, Virginia Railway Express, MARC Train |
| 24th | Australia | Melbourne | 622km | VicTrack, Public Transport Victoria |
| 25th | Germany | Munich | 620.1km | Munich S-Bahn, Munich U-Bahn, Münchner Verkehrsgesellschaft |
| 26th | USA | Philadelphia | 615.26km | SEPTA |
| 27th | China | Beijing | 608km | Beijing Metro |
| 28th | Russia | Moscow | 603.6km | Moscow Metro, Mosgortrans, Moscow Monorail |
| 29th | Italy | Turin | 552.2km | Trams in Turin, Turin Metro, Turin metropolitan railway service |
| 30th | Belgium | Brussels | 543.1km | Brussels Metro, Trams in Brussels, Brussels RER/GEN |
| 31st | Germany | Frankfurt | 506.9km | Frankfurt U-Bahn, Trams in Frankfurt am Main, Rhine-Main S-Bahn, Trams in Mainz, Trams in Darmstadt |
| 32nd | Germany | Hanover | 506km | Hanover Stadtbahn, Hanover S-Bahn |
| 33rd | Austria | Zurich | 498.7km | Zürich S-Bahn, Trams in Zürich |
| 34th | Sweden | Stockholm | 478.7km | Stockholm Metro, Stockholm commuter rail, Arlanda Express, AB Stockholms Spårvägar, Roslagsbanan, Saltsjöbanan |
| 35th | Spain | Valencia | 470.4km | Ferrocarrils de la Generalitat Valenciana, Cercanías Valencia, Metrovalencia |
| 36th | Malaysia | Kuala Lumpur | 465.0km | Rapid KL, KLIA Ekspres, Port Klang Line, Seremban Line |
| 37th | Italy | Milan | 460.0km | Milan Metro, Milan suburban railway service |
| 38th | India | Mumbai | 447.8km | Mumbai Metro, Mumbai Suburban Railway, Mumbai Monorail |
| 39th | USA | San Francisco | 431.8km | BART, MUNI, Santa Clara Valley Transportation Authority, Caltrain |
| 40th | China | Guangzhou | 398.3km | Guangzhou Metro, Haizhu Island Circular New Tram |
| 41st | Germany | Bremen | 384.6km | Bremen S-Bahn, Trams in Bremen |
| 42nd | Germany | Hamburg | 382.7km | Hamburg U-Bahn, Hamburg S-Bahn, AKN Eisenbahn |
| 43rd | China | Nanjing | 363.86km | Nanjing Metro, Trams in Nanjing |
| 44th | India | Delhi | 349.38km | Delhi Metro, Delhi rig railway, Shahdara-Ghaziabad, Sahibabad-Minto Bridge, Dayabasti-Gurgaon |
| 45th | Germany | Stuttgart | 347.736km | Stuttgart Stadtbahn, Stuttgart S-Bahn, Stuttgart Rack Railway, Standseilbahn Stuttgart |
| 46th | Brazil | Sao Paulo | 341.7km | São Paulo Metro, CPTM |
| 47th | Brazil | Rio De Janeiro | 338km | SuperVia, Rio de Janeiro Metro, Rio de Janeiro Light Rail |
| 48th | Germany | Karlsruhe | 333.9km | Karlsruhe Stadtbahn, Trams in Karlsruhe |
| 49th | Switzerland | Basel | 327km | Basel Regional S-Bahn, Trams in Basel |
| 50th | Canada | Montreal | 325.6km | Réseau de transport métropolitain, Montreal Metro |
| 51st | Russia | Saint Petersberg | 318.7km | Saint Petersburg Metro, Trams in Saint Petersburg |
| 52nd | Germany | Nuremburg | 299.1km | Trams in Nuremberg, Nuremberg U-Bahn, Nuremberg S-Bahn |
| 53rd | Spain | Bilbao | 297.72km | Metro Bilbao, Cercanías Bilbao, Line A (EuskoTran), Artxanda Funicular, Euskotren Trena |
| 54th | China | Shenzhen | 297.7km | Shenzhen Metro, Shenzhen Tram |
| 55th | Denmark | Copenhagen | 290.2km | Copenhagen Metro, S-train (Copenhagen), Trams in Copenhagen |
| 56th | Netherland | Rotterdam | 272.3km | Trams in Antwerp |
| 57th | China | Hong Kong | 266.9km | Hong Kong MTR, |
| 58th | China | Chongqing | 264km | Chongqing Metro |
| 59th | Germany | Dresden | 262km | Dresden S-Bahn, Trams in Dresden |
| 60th | Mexico | Mexico City | 253.5km | Mexico City Metro, Suburban Railway of the Valley of Mexico Metropolitan Area |
| 61st | Chile | Santiago | 251.8km | Santiago Metro, Metrotrén |
| 62nd | Taiwan | Taipei | 249.53km | Taipei Metro, Taoyuan Airport MRT,TRA(Keelung～Zhongli) |
| 63rd | Japan | Okayama, Kurashiki, Fukuyama | 241.6km | Mizushima Rinkai Railway, Okayama Electric Railway, ICOCA Area(Easternmost: Mihara, Westernmost: Wake, Southernmost: Kojima) |
| 64th | Italy | Naples | 234.46km | Trams in Naples, Naples Metro, Circumflegrea railway, Circumvesuviana, Cumana railway, Naples–Aversa railway, funiculars |
| 65th | China | Wuhan | 234.4km | Wuhan Metro |
| 66th | Ukraine | Kiev | 230.786km | Kiev Metro, Kiev Light Rail, Trams in Kiev, Kiev Funicular |
| 67th | Japan | Sapporo | 228.2km | Area |
| 68th | Iran | Tehran | 221km | Tehran Metro |
| 69th | Indonesia | Jakarta | 218km | Kereta Commuter Indonesia |
| 70th | Romania | Bucharest | 216.35km | Bucharest Metro, Bucharest Light rail |
| 71st | Japan | Sendai | 213.1km | Area |
| 72nd | Czech | Prague | 208.1km | Prague Metro, Prague Public Transit Company, Petřín funicular |
| 73rd | Japan | Hiroshima | 204.6km | Area |
| 74th | Singapore | Singapore | 199.6km | Mass Rapid Transit (Singapore) |
| 75th | China | Chengdu | 196.5km | Chengdu Metro |
| 76th | Bulgaria | Sofia | 194km | Sofia Metro, Trams in Sofia |
| 77th | China | Tianjin | 173.9km | Tianjin Metro, |
| 78th | China | Dalian | 173.82km | Dalian Metro, Trams in Dalian |
| 79th | Finland | Helsinki | 172.2km | Helsinki Metro, ,Helsinki Tram, Helsinki commuter rail |
| 80th | USA | Los Angeles | 170.301km | Angels Flight, Los Angeles County Metropolitan Transportation Authority, Getty Center Monorail |
| 81st | S.Korea | Busan | 168.4km | Busan Transportation Corporation, B&G Metro, KORAIL Donghae Line |
| 82nd | Poland | Warsaw | 167km | Trams in Warsaw, Warsaw Metro |
| 83rd | Turkey | Istanbul | 155.117km | Istanbul Metro, Istanbul Tram, Marmaray, Funiculars |
| 84th | Japan | Takamatsu | 146.7km | Kotoden, JR Koutoku Line(Orange town～Takamatsu), JR Yosan Line(Takamatsu～Kannonji)、JR Dosan Line(Tadotsu～Kotohira) |
| 85th | China | Suzhou | 139.19km | Suzhou Metro, Tram Line 1 |
| 86th | China | Shenyang | 125.16km | Shenyang Metro, Shenyang Modern Tram |
| 87th | Portugal | Lisboa | 124.2km | Lisbon Metro, Trams in Lisbon, Fertagus |
| 88th | Netherland | Amsterdam | 123km | Trams in Amsterdam, Amsterdam Metro |
| 89th | UK | Liverpool | 120.7km | Merseyrail |
| 90th | China | Hanzhou | 117.3km | Hanzhou Metro |
| 91st | Netherland | Antwerp | 116.6km | Trams in Antwerp |
