Line 5 may refer to:
Public transport Asia Bangladesh MRT Line 5 (Dhaka Metro Rail) China Line 5 (Beijing Subway) Line 5 (Changsha Metro) Line 5 (Chengdu Metro) Line 5 (Chongqing Rail Transit) Line 5 (Dalian Metro) Line 5 (Fuzhou Metro) Line 5 (Guangzhou Metro) Line 5 (Hangzhou Metro) Line 5 (Hefei Metro) Line 5 (Kunming Metro) Line 5 (Nanning Metro) Line 5 (Ningbo Rail Transit) Line 5 (Shanghai Metro) Line 5 (Shenzhen Metro) Line 5 (Suzhou Metro) Line 5 (Tianjin Metro) Line 5 (Wuhan Metro) Line 5 (Xi'an Metro) Line 5 (Zhengzhou Metro)
India Line 5 (Chennai Metro), or Red line, under construction in India Line 5 (Delhi Metro), or Green Line Line 5 (Mumbai Metro) Pink Line (Kolkata Metro)
Japan Sennichimae Line, Osaka Tokyo Metro Tozai Line
Other Asian countries Tehran Metro Line 5, Iran Kelana Jaya line, Kuala Lumpur, Malaysia Makati Intra-city Subway, Makati, Philippines (under construction) Line 5 (Riyadh Metro), Saudi Arabia Seoul Subway Line 5, South Korea Bannan line, Taipei, Taiwan
Australia T5 Cumberland Line, Sydney Train service
Europe France Île-de-France tramway Line 5 Paris Metro Line 5
Italy Circumflegrea railway, Naples Milan Metro Line 5
Russia Koltsevaya line, Moscow Line 5 (Saint Petersburg Metro)
Spain Barcelona Metro line 5, Spain Line 5 (Madrid Metro), Spain Line 5 (Bilbao Metro), Spain (under study)
Other European countries U5 (Vienna U-Bahn), Austria (planned) Brussels Metro line 5, Belgium U5 (Berlin U-Bahn), Germany Metro Line M5 (Budapest Metro), Hungary Tramlijn 5, Amsterdam), Netherlands Bucharest Metro Line M5, Romania S5 (ZVV), Zurich, Switzerland Livoberezhna line (Kyiv Metro), Ukraine (rejected) Vyshhorodsko–Darnytska line, Kyiv, Ukraine (proposed)
North America Canada Line 5 Eglinton, Toronto Blue Line (Montreal Metro), also known as Line 5
United States Route 5 (MTA Maryland), a bus route 5 (New York City Subway service) 5 (Los Angeles Railway) (defunct)
Other North American countries Line 5, on the Havana Suburban Railway, Cuba Mexico City Metro Line 5, Mexico Mexico City Metrobús Line 5, a bus rapid transit line in Mexico City Line 5 (Panama Metro) (planned)
South America Line 5 (São Paulo Metro), Brazil Santiago Metro Line 5, Chile Lima Metro, Peru (planned)
Other uses Enbridge Line 5, a Canadian oil pipeline Regiment Liberation - 5th of the Line, a Belgium line infantry regiment
See also List of public transport routes numbered 5