The Taoyuan Metro (formerly Taoyuan Rail Transit and officially Taoyuan Mass Rapid Transit System) is a rapid transit system serving Taoyuan City, as well as parts of New Taipei City and Taipei City, in Taiwan. The most recently proposed network includes 11 lines and extensions, of which two are now under construction. The Taoyuan Airport MRT (Taipei Main Station - Laojie River) is the only line currently in operation. The system opened with the opening of the first line in the system, Taoyuan Airport MRT, for trial passenger service on 2 February 2017 and revenue passenger service on 2 March 2017.
There are two types of Airport MRT services, Commuter and Express. Express trains stop at , , , , and . During peak hours, some Express services continue further, stopping at Taoyuan HSR and Huanbei. Commuter trains stop at every station.
Free Wi-Fi is available throughout the system.
All Taoyuan Metro lines will use standard gauge track.
The Taoyuan portion of the TRA Western Line, which runs on narrow-gauge tracks (along with the rest of the Taiwan Railway network), will be reconstructed as an underground railway tunnel, with infill stations added at Pingzhen, Zhongyuan, Taoyuan General Hospital, and Zhonglu. It is intended to provide more frequent, rapid transit-style local rail services (similar to TRA grade separation projects in Greater Taipei, Taichung and Kaohsiung).
The Green Line passed an environmental impact assessment in July 2014. Construction of the Green Line started in October 2018 and is expected to open in three phases in 2026, 2028 and 2030 respectively. Construction of the Brown Line is expected to commence in late 2025, and expected to be completed by 2032.