The Jurong Region Line (JRL) is a Mass Rapid Transit (MRT) line under development in Singapore. It will serve the western parts of the country, particularly the new town of Tengah and its surrounding areas. First envisioned as a Light Rail Transit (LRT) line in 2001, it was put on hold throughout the 2000s before its current iteration as a MRT line was confirmed in 2013. The line is set to open in stages from 2027 to 2029.

The JRL will have 24 stations, serving Choa Chu Kang in the north, Jurong Pier in the south, Peng Kang Hill in the west and Pandan Reservoir in the east. A West Coast extension to Haw Par Villa station, which is a part of the Circle Line, is under consideration. The line is coloured teal on the rail map. It will be the seventh MRT line in Singapore. It will use J151 trains supplied by Hyundai Rotem in a three to four-car formation, and a moving block signalling system supplied by Siemens.