Orange Line may refer to:
Public transit Asia India Orange Line (Mumbai Metro), Thane, India Orange Line (Namma Metro), Bengaluru, India Line 4 (Chennai Metro), Chennai, India Orange Line (Jaipur Metro), Jaipur, India Orange Line (Kanpur Metro), Kanpur, India Orange Line (Kolkata Metro), Kolkata, India Orange Line (Nagpur Metro), Nagpur, India Airport Express Line (Delhi Metro), Delhi, India
South Korea Line 1 (Busan), South Korea Line 2 (Incheon), South Korea Line 3 (Seoul), South Korea U Line, Uijeongbu, South Korea
Others Orange Line (Bangkok), a planned line in Bangkok, Thailand Tung Chung line, Hong Kong, China Jakarta LRT, Jakarta, Indonesia Orange Line, KMRT, Kaohsiung, Taiwan Ampang Line, Kuala Lumpur, Malayasia Orange Line (Lahore Metro) in Lahore, Pakistan PNR Metro South Commuter Line, Manila, Philippines Line 3 (Riyadh Metro), Riyadh, Saudi Arabia Circle Line (Singapore), Singapore Zhonghe-Xinlu Line of Taipei Metro, Taipei, Taiwan
Europe Kaluzhsko-Rizhskaya line, Moscow, Russia London Overground, London, UK Paris Metro Line 5, Paris, France Brussels Metro line 2, Brussels, Belgium Line 7 (Madrid Metro), Madrid, Spain Barcelona Metro line 9, Barcelona, Spain U9 (Berlin U-Bahn), Berlin, Germany
North America Broad Street Line, Philadelphia, Pennsylvania Line 5 Eglinton, a light rail line in Toronto, Ontario, Canada MAX Orange Line (TriMet), a light rail line in Portland, Oregon Orange Line (CTA), Chicago, Illinois Orange Line (DART), a light rail line in Dallas, Texas G Line (Los Angeles Metro), a busway line in Los Angeles, California formerly known as Orange Line Orange Line (MBTA), Boston, Massachusetts Orange Line, Metrorail, Florida Metro Orange Line (Minnesota), a bus rapid transit line serving Minneapolis, Minnesota Orange Line (Montreal Metro), Montreal, Quebec, Canada Orange Line (San Diego Trolley), San Diego, California Orange Line (Sound Transit), a streetcar line in Tacoma, Washington, United States Orange Line (Washington Metro), Washington, DC Orange Line (BART), San Francisco Bay Area, California Viva Orange, York Region, Ontario, Canada IND Sixth Avenue Line in New York City, colored orange on maps, which carries the B D F M trains Orange B Line Orange D Line Orange F Line Orange M Line Orange Line (VTA), a light rail in Santa Clara County, California Orange Line (CapMetro), a planned light rail line in Austin, Texas Orange Line (Mexico City Metro) C Line (RTD), a former light rail line in the Denver metropolitan area, Colorado
South America Line 6 (São Paulo Metro), São Paulo, Brazil Line 1 (Rio de Janeiro), Rio de Janeiro, Brazil
Road transportation Orange Belt (Pittsburgh), Pittsburgh, Pennsylvania