Line 13 may refer to:
Asia Line 13 (Beijing Subway), China Line 13 (Chengdu Metro), China Line 13 (Dalian Metro), China Line 13 (Guangzhou Metro), China Line 13 (Mumbai Metro), India (planned) Line 13 (Shanghai Metro), China Line 13 (Shenzhen Metro), China MRT Circle Line, numbered 13, Malaysia Tokyo Metro Fukutoshin Line, officially line 13, Japan West Coast Line (Qingdao Metro), number 13, China
Europe Moscow Monorail, Line 13 of the Moscow Metro, Russia Line 13, part of the Red Line (Stockholm Metro), in Sweden Barcelona Metro line 13, Spain Paris Metro Line 13, France S13 (ZVV), Zurich, Switzerland
North America 13 (BMT rapid transit service), New York City, US (defunct) T3 (SEPTA Metro), formerly Route 13, a light rail line in Philadelphia, US Mont-Saint-Hilaire line, also designated as line 13, a commuter rail service in Greater Montreal, Quebec
South America Line 13 (CPTM), São Paulo, Brazil
See also List of public transport routes numbered 13