Metrorail or metro rail may refer to:
Rapid transit, a frequent electric rail system commonly called a metro
Metro Railway, Kolkata, owner and operator of Kolkata Metro, India
Dhaka Metro Rail, MRT metro service serving Bangladesh's capital city of Dhaka
Metrorail (South Africa), a commuter rail system operator in South Africa
Metrorail Eastern Cape, commuter rail lines serving Port Elizabeth and East London
Metrorail Gauteng, the commuter rail system in Gauteng province (including Johannesburg and Pretoria)
Metrorail KwaZulu-Natal, the commuter rail system in Durban
Metrorail Western Cape, the commuter rail system in Cape Town
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
CapMetro Rail, 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