MNR

MNR may stand for:

Transportation

 * Maine Northern Railway
 * Metro-North Railroad in New York State
 * Mid-Norfolk Railway, a heritage railway in Norfolk, England
 * Manx Northern Railway, a railway on the Isle of Man from 1879 to 1905
 * Manor Road railway station, Wirral, England

Manufacturing

 * Marc Nordon Racing, a manufacturer of Kit Cars in the UK

Political movements

 * Mouvement National Républicain, a political party in France
 * Mouvement national royaliste, a Belgian resistance group
 * Movimiento Nacionalista Revolucionario, a political party in Bolivia
 * Movimiento Nueva República, a progressive political party in Guatemala

Other uses

 * Marine Nature Reserve, a UK conservation designation
 * McMaster Nuclear Reactor, a nuclear reactor in Canada
 * Ministry of Natural Resources (Ontario), a government agency in Canada
 * Minister of National Revenue (Canada), minister in charge of taxation