Name |
System |
Country |
Stations |
Length in km (mi) |
Year of completion
|
Lines 3-11 |
Suzhou Metro |
China |
Line 3 and Line 11 are connected at Weiting Station with through trains passing by. |
86.54 km (53.77 mi) |
2019–2023 |
Line 6 |
Chengdu Metro |
China |
Wangcong Temple – Lanjiagou |
68.2 (42.4)[1] |
2020 |
Line 19 |
Chengdu Metro |
China |
Huangshi to Tianfu |
67 km (42 mi) |
2020–2023 |
Line 1 |
Qingdao Metro |
China |
Dongguozhuang to Wangjiagang |
59.82 km (37.17 mi) |
2020–2021 |
Line 18 |
Guangzhou Metro |
China |
Xiancun[2] to Wanqingsha |
58.3 (36.2)[2] |
2021 |
Line 3 |
Guangzhou Metro |
China |
Airport North – Panyu Square |
57.93 (36) |
2005–2018 |
Bolshaya Koltsevaya line |
Moscow Metro |
Russia |
Circle route |
57.54 km (35.75 mi)[3][4] (excluding Moscow-City branch) |
2018–2023[5] |
Line 10 |
Beijing Subway |
China |
Circle route |
57.1 (35.5) |
2008–2013 |
Line 6 |
Beijing Subway |
China |
Jin'anqiao – Lucheng |
53.4 (33.2) |
2012–2018 |
Seoul Subway Line 5 (longest branch) |
Seoul Subway |
South Korea |
Banghwa–Hanam Geomdansan |
51.7 km (32.1 mi) |
1995–2021 |
M11 |
Istanbul Metro |
Turkey |
Gayrettepe – Arnavutköy Hastane |
51.5 (32) |
2023–2024 |
Line 2 |
Wuhan Metro |
China |
Julong Boulevard - Fozuling |
50.347 (27.556) |
2012–2019 |
Arbatsko-Pokrovskaya line |
Moscow Metro |
Russia |
Pyatnitskoye Shosse – Shchyolkovskaya |
45.1 (28.0) |
1938–2012 |
Sokolnicheskaya line |
Moscow Metro |
Russia |
Kommunarka – Bulvar Rokossovskogo |
44.5 (27.7) |
1935–2019 |
Lyublinsko-Dmitrovskaya line |
Moscow Metro |
Russia |
Zyablikovo – Fiztekh |
44.3 (27.5) |
1995–2023 |
Zamoskvoretskaya line |
Moscow Metro |
Russia |
Khovrino – Alma-Atinskaya |
42.8 (26.6) |
1938–2018 |
Line 8 |
Beijing Subway |
China |
Yuzhi Lu – Wufutang |
42.6 (26.4) |
2012–2021 |
Line 15 |
Shanghai Metro |
China |
Gucun Park – Zizhu Hi-tech Park |
42.3 (26.3) |
2021 |
Line 5 |
Chengdu Metro |
China |
Jiudaoyan – Huilong |
42.3 (26.3) |
2019 |
Tagansko-Krasnopresnenskaya line |
Moscow Metro |
Russia |
Planernaya – Kotelniki |
42.2 (26.2) |
1966–2015 |
Line 14 |
Beijing Subway |
China |
Dawayao – Shangezhuang |
42 (26) |
2015–2021 |
Line 6 |
Tianjin Metro |
China |
Nanhezhuang – Lushuidao |
42 (26) |
2016–2021 |
Downtown MRT line |
Mass Rapid Transit (Singapore) |
Singapore |
Bukit Panjang – Expo |
41.9 (26)[6] |
2013–2017 |
Line 3 |
Nanjing Metro |
China |
Xinghuolu – Mozhoudonglu |
41.5 (25.8) |
2015 |
Line 4 |
Suzhou Metro |
China |
Longdaobang — Tongli |
41.5 (25.8) |
2017 |
Serpukhovsko-Timiryazevskaya line |
Moscow Metro |
Russia |
Altufyevo – Bulvar Dmitriya Donskogo |
41.2 (25.6) |
1983–2002 |
L-12 (Metro Sur) |
Madrid Metro |
Spain |
Circle route |
40.96 (25.5) |
2003 |
Toei Oedo Line [citation needed] |
Toei Subway |
Japan |
Hikarigaoka – Shiodome – Tocho-mae |
40.7 (25.3) |
2000 |
Seoul Subway Line 9 |
Seoul Subway |
South Korea |
Gimpo Airport – VHS Medical Center |
40.6 (25.2) |
2018 |
Line 12 |
Shanghai Metro |
China |
Qixin Road – Jinhai Road |
40.4 (25.1) |
2015 |
Line 7 |
Beijing Subway |
China |
Beijing West railway station - Universal Resort |
40.3 (25.0) |
2021 |
Line 4 |
Chengdu Metro |
China |
Wansheng – Chengdu University |
39.3 (24.4) |
2015–2017 |
Line 7 |
Chengdu Metro |
China |
Circle route |
38.6 (24.0) |
2017 |
Kaluzhsko-Rizhskaya line |
Moscow Metro |
Russia |
Medvedkovo – Novoyasenevskaya |
37.8 (23.5) |
1958–1990 |
Line 1 |
Chengdu Metro |
China |
Weijianian – Science City |
37.47 (23.3) |
2010–2018 |
Line 2 |
Shenzhen Metro |
China |
Chiwan – Xinxiu |
35.78 (22.23) |
2011 |
Busan Subway Line 2 |
Busan Transportation Corporation |
South Korea |
Jangsan–Dongwon |
35.5 (22.06) |
1999 |
Seoul Subway Line 6 |
Seoul Subway |
South Korea |
Eungam Loop – Bonghwasan |
35.1 (21.8) |
2001 |
Seoul Subway Line 7 (longest branch) |
Seoul Subway |
South Korea |
Cheongdam – Bupyeong-gu Office |
35.1 (21.7) |
2012 |
Line 5 |
Tianjin Metro |
China |
Beichenkejiyuanbei – Liqizhuangnan |
34.8 (21.6) |
2018–2021 |
Line 7 |
Shanghai Metro |
China |
Panguang Road – Huamu Road |
34.4 (21.38) |
2010 |
Line 8 |
Guangzhou Metro |
China |
Wanshengwei—Jiaoxin |
33.9 (21.1) |
2010–2020 |
M4 |
Istanbul Metro |
Turkey |
Kadıköy – Sabiha Gökçen Havalimanı |
33.5 (20.8) |
2012–2022 |
Circle MRT line |
Mass Rapid Transit (Singapore) |
Singapore |
Dhoby Ghaut – HarbourFront |
33.3 (20.69)[7] |
2009–2012 |
L-7 |
Madrid Metro |
Spain |
Hospital del Henares – Pitis |
32.9 (20.5) |
2007 |
U7 |
Berlin U-Bahn |
Germany |
Rathaus Spandau-Rudow |
31.8 (19.7)[8] |
1924–1984 |
Line 1 |
Beijing Subway |
China |
Pingguoyuan – Dawang Lu |
31.0 (19.3) |
1971–2000 |
Line 16 |
Beijing Subway |
China |
Bei'anhe – Yuyuantan East Gate |
31.0 (19.2) |
2016–2021 |
Solntsevskaya line |
Moscow Metro |
Russia |
Aeroport Vnukovo – Delovoy Tsentr |
30.9 (19.2) |
2014–2023 |
IND Eighth Avenue Line and IND Fulton Street Line[9] |
New York City Subway |
United States |
Inwood – 207th Street – Grant Avenue |
30.8 (19.14) |
1956 |
Line 2 Orange |
Montreal Metro |
Canada |
Côte-Vertu – Montmorency |
30.8 (19.14) |
2007 |
Thomson–East Coast line |
Mass Rapid Transit (Singapore) |
Singapore |
Woodlands North – Gardens by the Bay |
30.4 km (18.9 mi) |
2020–2022 |
Line 2 |
Shanghai Metro |
China |
East Xujing – Longyang Road |
30.2 (18.77) |
2010 |
Moskovsko-Petrogradskaya Line |
Saint Petersburg Metro |
Russia |
Parnas–Kupchino |
30.1 (18.7) |
1961–2006 |
Line 8 |
Shanghai Metro |
China |
Shiguang Road – Luheng Road |
29.7 (18.45) |
2009 |
Kirovsko-Vyborgskaya Line |
Saint Petersburg Metro |
Russia |
Devyatkino – Prospekt Veteranov |
29.57 (18.4) |
1955–1978 |
Line 8 |
Chengdu Metro |
China |
(Phase 2 is 7.94 km) |
29.1 (18.1) |
2020 |
Line 2 |
Chengdu Metro |
China |
Tianhe Road – Chengdu Institute of Public Administration |
29.0 (18.0) |
2012–2013 |
Bannan Line (Taipei Metro Blue Line) |
Taipei Metro |
Taiwan |
Dingpu – Taipei Nangang Exhibition Center |
28.2 (17.6)
|
1999–2015 |
Line 4 |
Beijing Subway |
China |
Anheqiao Bei (N) – Gongyi Xiqiao |
28.2 (17.5) |
2009–2010 |
Incheon Subway Line 1 |
Incheon Subway |
South Korea |
Bakchon – International Business District |
27.9 (17.42) |
1999–2009 |
Northern line |
London Underground |
United Kingdom |
Morden – East Finchley |
27.8 (17.2) |
1890–1940 |
Nevsko-Vasileostrovskaya Line |
Saint Petersburg Metro |
Russia |
Begovaya–Rybatskoye |
27.7 (17.2) |
1967–2018 |
Tanimachi Line |
Osaka Metro |
Japan |
Dainichi–Nagahara |
27.1 (16.7) |
1967–1983 |
M5 |
Istanbul Metro |
Turkey |
Üsküdar – Samandıra Merkez |
26.5 (12.5) |
2017–2024 |
Meijo Line [citation needed] |
Nagoya Municipal Subway |
Japan |
Kanayama–Nagoya Dome-mae Yada-Kanayama |
26.4 (16.4) |
1965–2004 |
B Line |
Los Angeles Metro Rail |
United States |
North Hollywood - Union Station |
26.4 (16.4) |
1993–2000 |
Frunzensko-Primorskaya Line |
Saint Petersburg Metro |
Russia |
Komendantsky Prospekt – Shushary |
26.2 (16.3) |
1997–2019 |
Line 1 |
Suzhou Metro |
China |
Mudu – Zhongnan Jie |
25.7 (16.0) |
2012 |
Line 3[10] |
Athens Metro |
Greece |
Dimotiko Theatro – Doukissis Plakentias |
25.3 (15.72) |
2023 |
Helsinki Metro |
Helsinki Metro |
Finland |
Kalasatama – Kivenlahti |
25.2 (15.7) |
1982–2022 |
Orange Line |
Taipei Metro |
Taiwan |
Huilong–Nanshijiao |
25.1 (15.6) (longest branch) |
1998–2013 |
Line 3 |
Santiago Metro |
Chile |
Plaza de Quilicura - Fernando Castillo Velasco |
25 (13.5) |
2019–2023 |
Yurakucho Line |
Tokyo Metro |
Japan |
Chikatetsu Narimasu – Tatsumi |
24.6 (15.3) |
1974–1988 |
U2 |
Munich U-Bahn |
Germany |
Feldmoching – Messestadt Ost |
24.4 (15.2) |
1980–2001 |
Yellow Line |
Delhi Metro |
India |
GTB Nagar – Saket |
24 (14.9)[11][12] |
2009–2010 |
L-1 |
Madrid Metro |
Spain |
Valdecarros – Pinar de Chamartín |
23.88 (14.84) |
1919–2007 |
L-6 |
Madrid Metro |
Spain |
Circle route |
23.47 (14.58) |
1979–2007 |
Line 9 |
Shanghai Metro |
China |
Jiuting – Middle Yanggao Road |
23.3 (14.48) |
2007–2010 |
Line 1 Green |
Montreal Metro |
Canada |
Angrignon – Honoré-Beaugrand |
23.26 (14.45) |
1966–1978 |
Warsaw Metro M1 |
Warsaw Metro |
Poland |
Kabaty–Młociny |
23.1 (14.35) |
1995–2008 |
Line 2 |
Beijing Subway |
China |
Circle route |
23.1 (14.35) |
1984–1987 |
M3 |
Istanbul Metro |
Turkey |
Bakırköy Sahil – Şehir Hastanesi Viaduct |
22.6 (16.6) |
2013–2024 |
Line 9 |
Chengdu Metro |
China |
Phase 1 of the second loop line in Chengdu, all underground |
22.18 km (13.78 mi) |
2020 |
Line 19 |
Beijing Subway |
China |
Mudanyuan – Xingong |
22.4 (13.9) |
2021 |
Songshan-Xindian Line (Taipei Metro Green Line) |
Taipei Metro |
Taiwan |
Songshan-Xindian |
21.3 (13.2) |
1998–2014 |
Line 4 |
Shanghai Metro |
China |
Hailun Road – Yishan Road |
21.1 (13.11) |
2005–2007 |
Toei Mita Line |
Toei Subway |
Japan |
Meguro – Shimura-Sakaue |
21.1 (13.11) |
1968–2000 |
Victoria line |
London Underground |
United Kingdom |
Walthamstow Central – Brixton |
21.0 (13.05) |
1968–1971 |
Obolonsko–Teremkivska line |
Kyiv Metro |
Ukraine |
Heroiv Dnipra–Teremky |
20.95 (13.02) |
1976–2013 |
Line 6 |
Shanghai Metro |
China |
Boxing Road – Oriental Sports Center |
20.34 (12.64) |
2007–2011 |
Line 1 |
Barcelona Metro |
Spain |
Fondo – Hospital de Bellvitge |
20.2 (12.56) |
1926–1989 |
Tozai Line [citation needed] |
Sapporo Municipal Subway [citation needed] |
Japan |
Miyanosawa – Shin-Sapporo [citation needed] |
20.1 (12.4) |
1976–1999 |
M1 |
Ankara Metro |
Turkey |
Koru – Atatürk Kültür Merkezi |
20.1 (12.4) |
1997–2014 |
L-5 |
Madrid Metro |
Spain |
Alameda de Osuna – Empalme |
20.005 (12.5) |
1968–2006 |
Line 9 |
Barcelona Metro |
Spain |
Zona Universitaria – Aeroport T1 |
20.0 (12.5) |
2004–2016 |
North East MRT line |
Mass Rapid Transit (Singapore) |
Singapore |
HarbourFront–Punggol |
20.0 (12.43)[13] |
2003–2011 |
Bucharest Metro Line M3 |
Bucharest Metro |
Romania |
Preciziei – Anghel Saligny |
20.0 (12.43) |
1983–2008 |
Line 2 |
Tianjin Metro |
China |
Caozhuang – Guoshanlu |
19.7 (12.2) |
2012–2014 |
Nekrasovskaya line |
Moscow Metro |
Russia |
Nizhegorodskaya – Nekrasovka |
19.6 (12.2) |
2019–2020 |
Paris Métro Line 9 |
Paris Métro |
France |
Pont de Sèvres – Mairie de Montreuil |
19.6 (12.18) |
1922–1937 |
M2 |
Istanbul Metro |
Turkey |
Şişhane – Hacıosman Line is 23,49 km long, but the longest continuous underground section is 19.54 km long. |
19.54 (12.14) |
2000–2014 |
Red, Yellow, Blue, and Green Lines |
Bay Area Rapid Transit, San Francisco |
United States |
Balboa Park – West Oakland |
19.5 (12.12) |
1973 |
Metro Northwest |
Sydney Metro |
Australia |
Cherrybrook–Chatswood |
19.5 km (12.1 mi) |
2009–2019 |
Kol'tsevaya Line |
Moscow Metro |
Russia |
Circle route |
19.4 (12.2) |
1950–1954 |
U3 |
Munich U-Bahn |
Germany |
Moosach – Fürstenried West |
19.4 (12.05) |
1972–2009 |
Line 4 |
Tianjin Metro |
China |
Dongnanjiao – Xinxingcun |
19.4 (12) |
2021 |
Line 3 |
Tianjin Metro |
China |
Huayuan – Tianshili |
19.2 (11.9) |
2012–2013 |
Maskoŭskaja line |
Minsk Metro |
Belarus |
Malinawka–Uruchcha |
19.1 (11.9) |
1984–2014 |
Midosuji Line |
Osaka Metro |
Japan |
Nakatsu – Nakamozu |
19.1 (11.87) |
1933–1987 |
Line 5 |
Barcelona Metro |
Spain |
Vall d'Hebron – Cornella centre |
19.0 (11.8) |
1955–2010 |
Warsaw Metro M2 |
Warsaw Metro |
Poland |
Bemowo–Bródno |
18.9 km (11.7 mi) |
2015–2022 |
Mexico City Metro Line 3 |
Mexico City Metro |
Mexico |
La Raza – Universidad |
18.7 (11.62) |
1970–1983 |
Paris Métro Line 7 |
Paris Métro |
France |
La Courneuve – 8 Mai 1945 – Villejuif – Louis Aragon |
18.3 (11.6) |
1910–1987 |
Red Line |
Baku Metro |
Azerbaijan |
Icheri Sheher – Hazi Aslanov |
18.6 (11.6) |
1967–2002 |
Line 3 |
Barcelona Metro |
Spain |
Zona Universitària – Trinitat Nova |
18.4 (11.44) |
1925–2008 |
Line 1 |
Shanghai Metro |
China |
Shanghai South Railway – Shanghai Circus World |
18.1 (11.25) |
1993–2004 |
Avtozavodskaya Line |
Minsk Metro |
Belarus |
Kamennaya Gorka – Mogilevskaya |
18.1 (11.25) |
1990–2005 |
U8 |
Berlin U-Bahn |
Germany |
Wittenau – Hermannstraße |
18.1 (11.25) |
1927–1996 |
Line B |
Prague Metro |
Czechia |
Rajská zahrada – Hůrka |
18.0 (11.2) |
1998 |
Line 2[10] |
Athens Metro |
Greece |
Anthoupoli – Elliniko |
17.9 (11.12) |
2013 |
Line 5 |
Beijing Subway |
China |
Huixin Xijie Beikou – Songjiazhuang |
17.8 (11.1) |
2007 |
Washington, DC Metro Red Line |
Washington Metro |
United States |
Union Station – Medical Center |
17.8 (11.05) |
1984 |
Line 15 |
Beijing Subway |
China |
Qinghua Donglu Xikou – Maquanying |
17.6 (10.9) |
2014
|
Tozai Line |
Kyoto Municipal Subway |
Japan |
Uzumasa Tenjingawa-Yamashina-Rokujizo |
17.5 (10.92) |
2008[page needed] |
Line 4 |
Barcelona Metro |
Spain |
Trinitat Nova – La Pau |
17.3 (10.76) |
1908[clarification needed]–1999 |
Kholodnohirsko–Zavodska line |
Kharkiv Metro |
Ukraine |
Kholodna Hora – Industrialna |
17.3 (10.7) |
1975–1978 |
Milan Metro M3 |
Milan Metro |
Italy |
Comasina – San Donato |
17.105 (10.62) |
1990–2011 |
Bucharest Metro Line M2 |
Bucharest Metro |
Romania |
Pipera – Berceni |
17.1 (10.62) |
1986–1987 |
Tōzai Line |
Tokyo Metro |
Japan |
Nakano–Minami-Sunamachi |
17.0 (10.56) |
1969 |
M1 |
İzmir Metro |
Turkey |
Kaymakamlık – Basmane Line is 27 km long, but only 19.8 km of it is underground in two noncontinuous sections. The shorter underground section is 2.9 km long. |
16.9 (10.5) |
2000–2024 |
Hanzomon Line |
Tokyo Metro |
Japan |
Shibuya-Oshiage |
16.8 (10.4) |
1978–2003 |
Mexico City Metro Line 1 |
Mexico City Metro |
Mexico |
Observatorio – Pantitlán |
16.7 (10.38) |
1984 |
Blue Line |
Chennai Metro |
India |
Saidapet - Tondiarpet |
16.6 (10.32) |
2018–2021 |
Line 9 |
Beijing Subway |
China |
National Library – Guogongzhuang |
16.5 (10.3) |
2012 |
Line 17 |
Beijing Subway |
China |
Shilihe – Jiahuihu |
16.5 (10.3) |
2021 |
L-3 |
Madrid Metro |
Spain |
Villaverde Alto – Moncloa |
16.42 (10.2) |
2007 |
Line 1 |
Chongqing Rail Transit |
China |
Chaotianmen – Shapingba |
16.4 (10.2) |
2011 |
Line A |
Prague Metro |
Czechia |
Nemocnice Motol – Depo Hostivař Line is 17.1 km long, but only 16.4 km of it is underground. |
16.4 (10.2) |
2015 |
Kalininskaya line |
Moscow Metro |
Russia |
Tretyakovskaya – Novokosino |
16.3 (10.1) |
1979–2012 |
L-4 |
Madrid Metro |
Spain |
Argüelles – Pinar de Chamartín |
16.0 (9.9) |
2007 |
Sviatoshynsko–Brovarska line |
Kyiv Metro |
Ukraine |
Akademmistechko–Dnipro |
16.0 (9.9) |
1960–2003 |
Seoul Subway Line 7 (shorter section) |
Seoul Subway |
South Korea |
Suraksan – Konkuk University |
16.0 (9.9) |
1996 |
U6 |
Berlin U-Bahn |
Germany |
Alt-Mariendorf – Kurt-Schumacher-Platz |
15.9 (9.86) |
1923–1966 |
M9 |
Istanbul Metro |
Turkey |
Ataköy – Olimpiyat Viaduct |
15.8 (10.7) |
2013–2024 |
M3 Line |
Copenhagen Metro |
Denmark |
Circle route |
15.5 km (9.6 mi) |
2019 |
Line 3[14] |
Budapest Metro |
Hungary |
Határ út–Újpest-központ Line is 17.39 km long, but only 15.5 km of it is underground. |
15.5 km (9.6 mi) |
1990
|
Line 1 |
Tianjin Metro |
China |
Qinjiandao – Tucheng |
15.37 (9.55) |
2006 |
Line 6 |
Santiago Metro |
Chile |
Cerrillos – Los Leones |
15.3 (9.5) |
2017 |
Paris Métro Line 12 |
Paris Métro |
France |
Front Populaire – Mairie d'Issy |
15.3 (9.5) |
1910–2012 |
Syretsko–Pecherska line |
Kyiv Metro |
Ukraine |
Syrets – Pivdennyi Bridge |
15.2 (9.4) |
1989–2004 |
Line 1 (Kolkata Metro) |
Kolkata Metro |
India |
Mahanayak Uttam Kumar -Dum Dum |
15.17 (9.38) |
1984–1995 |
Line 10 |
Chengdu Metro |
China |
Taipingyuan – Shuangliu West Station |
15.0 (9.32) |
2019 |
Island line |
MTR |
Hong Kong |
Kennedy Town[15] – Heng Fa Chuen |
15.0 (9.32) |
1985 (as Hong Kong)–2014
|