Mosonmagyaróvár (Hungarian: Mosonmagyaróvári járás) is a district in northern part of Győr-Moson-Sopron County.

Mosonmagyaróvár is also the name of the town where the district seat is found.

The district is located in the Western Transdanubia Statistical Region.

Besides the Hungarian majority, the main minorities are the German (approx.

5,000 persons in Mosonmagyaróvár District did not declare their ethnic group at the 2011 census.