Hyundai Rotem is a South Korean company manufacturing rolling stock, defense products and plant equipment. It is part of the Hyundai Motor Group. Its name was changed to the current one from Rotem on December 2007.

Notable projects include Hong Kong MTR's "K-Stocks", trains for the New Delhi Metro and automated trains for the Canada Line between Vancouver and Richmond in British Columbia, Canada. They are also to supply the Silverliner V commuter trains for SEPTA Regional Rail in the Philadelphia, Pennsylvania area. The Philippine National Railways have partnered with Hyundai Rotem to upgrade and construct its train and stations in the Luzon island for convenience and fast transportation on the said island; the trains have been delivered and are currently in service. Some of the stations have been finished and are just in need of minor touches.

The company was founded in 1999 as Korea Rolling Stock Corporation (KOROS), the result of merger between then three major rolling stock divisions of Hanjin Heavy Industries, Daewoo Heavy Industries and Hyundai Precision & Industries. The company subsequently changed its name to Railroading Technology System, or Rotem, on 1 January 2002. It adopted its current name in December 2007 to reflect its current owner. Hyundai Rotem currently employs 3,800 and exported to 29 countries worldwide.