MNR may stand for:

Transportation

Maine Northern Railway The Maine Northern Railway Company Limited is a U.S. and Canadian short line railroad owned by the New Brunswick Railway Company, a holding company that is part of "Irving Transportation Services", a division within the industrial conglomerate ...

* Metro-North Railroad in New York State *

Mid-Norfolk Railway The Mid-Norfolk Railway (MNR) is a preserved standard gauge heritage railway, one of the longest in Great Britain. Preservation efforts began in 1974, but the line re-opened to passengers only in the mid-1990s as part of the "new generation" ...

, a heritage railway in Norfolk, England *

Manx Northern Railway The Manx Northern Railway (MNR) was the second common carrier railway built in the Isle of Man. It operated as an independent concern only from 1879 to 1905. History When the people in the town of Ramsey realised their town was not going to ...

, 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

*, a political party in France *, a Belgian resistance group *, a political party in Bolivia *, a progressive political party in Guatemala

Other uses

Marine Nature Reserve Marine nature reserve (MNR) is a conservation designation officially awarded by a government to a marine reserve of national significance. Republic of Ireland Lough Hyne, a marine lake off of County Cork, is Ireland's only marine nature reserve. Un ...

, a UK conservation designation *

McMaster Nuclear Reactor The McMaster Nuclear Reactor (MNR) is a 5 MWth open pool reactor located on the campus of McMaster University, in Hamilton, Ontario, Canada. Description MNR began operating in April 1959, as the first university-based research reactor in t ...

, a nuclear reactor in Canada *

Ministry of Natural Resources (Ontario) The Northern Development, Mines, Natural Resources and Forestry is a government ministry of the Canadian province of Ontario that is responsible for Ontario's provincial parks, forests, fisheries, wildlife, mineral aggregates and the Crown land ...

, a government agency in Canada *

Minister of National Revenue (Canada) The minister of national revenue (french: ministre du revenu national) is the minister of the Crown in the Canadian Cabinet who is responsible for the Canada Revenue Agency (CRA), as well as the administration of taxation law and collection. T ...

, minister in charge of taxation {{disambiguation