Line 12

Line 12 can refer to the following :
 Line 12 (Beijing Subway), a subway line under construction in Beijing
 Line 12 (Dalian Metro), a metro line in Dalian, Liaoning, China
 Paris Métro Line 12
 Line 12 (Madrid Metro)
 Line 12 (Moscow Metro), a metro line of the Moscow Metro, Moscow, Russia
 Line 12 (Shanghai Metro), a metro line in Shanghai, China
 Toei Ōedo Line, officially line 12
 12 (BMT rapid transit service)
 Mexico City Line 12
 Sungai Buloh-Serdang-Putrajaya Line, called Line 12 at route map