Metrorail or metro rail may refer to:
- Rapid transit, a frequent electric rail system commonly called a metro
- Dhaka Metro Rail, MRT metro service serving Bangladesh's capital city of Dhaka
- Metrorail (South Africa), a commuter rail system operator in South Africa
- Los Angeles Metro Rail, the rapid transit and light rail system in Los Angeles, California, USA
- Washington Metro, the rapid transit system in Washington, D.C., USA
- Metrorail (Miami-Dade County), the rapid transit system in Miami-Dade County, primarily, Miami, Florida, USA
- METRORail, the light rail system in Houston, Texas, USA
- Valley Metro Rail, the light rail system in the Phoenix metropolitan area in Arizona, USA
- Buffalo Metro Rail, the light rail system in Buffalo, New York, USA
- Capital MetroRail, the commuter rail service in Austin, Texas, USA
- New MetroRail, transit improvements to Transperth Trains, the railway network of Perth, Western Australia, Australia
- Bahrain light rail network, future transit system in Manama, Bahrain