Metrobus may refer to:
- MCW Metrobus, a bus model manufactured by MCW in the 1970s and 1980s
- Metrobus (South East England) a bus operator in south-east England
- M-é-t-r-o-b-u-s, the bus and metro operator Tramway de Rouen in Rouen, France
- Metrobus, former branding of the West Yorkshire Passenger Transport Executive in West Yorkshire, England
- Mexico City Metrobús, a bus rapid transit system in the Mexican Federal District
- Metrobus (Buenos Aires), a bus rapid transit system in Buenos Aires, Argentina
- Metrobus (Istanbul), a public transit system in Istanbul, Turkey
- Metrobus (Miami), the bus network of Miami-Dade Transit in Miami, Florida, United States
- Metrobus (Montreal), an express bus between Repentigny, Quebec and Radisson
- Metrobus (St. John's), a public transit system in St. John's, Newfoundland and Labrador
- MetroBus (St. Louis), the bus system operated by the Bi-State Development Agency in St. Louis, Missouri
- metrobus (Sydney), a public transit system in Sydney, Australia
- Metrobus (Washington, D.C.), a bus service in Washington, DC, United States, and immediate suburbs in Maryland and Virginia
- Metrobus (Malaysia), a bus operator in the Klang Valley
- Metropolitan area bus
- METRO Bus (Houston, TX) Bus service in the Houston, Texas area
- Metro Bus, Metro Tasmania a public bus service in Tasmania, Australia.
- Metro Bus Corporation, a Seoul bus operator.