Martonvásár (Hungarian: Martonvásári járás) is a district in eastern part of Fejér County.
Martonvásár is also the name of the town where the district seat is found.
The district is located in the Central Transdanubia Statistical Region.
The number of the inhabited places in Martonvásár District is 8.
(ordered by population, as of 1 January 2012)[1] The bolded municipalities are cities.