Manganese(II) molybdate is an inorganic compound with the chemical formula MnMoO4.

[3] Manganese(II) molybdate can be prepared through a double displacement reaction between sodium molybdate and manganese sulphate:[1] Manganese(II) molybdate has minimal solubility in water and will form a white-yellow precipitate which turns beige upon being refluxed.

[1] The precipitate can then be filtered from solution, which gives the monohydrate (MnMoO4·H2O); heating to 360 °C then provides the anhydrous salt.

[4] MnMoO4 serves as the active material in electrodes for aqueous supercapacitors[2][5] due to fast pseudocapacitive redox reactions.

It has been evaluated as catalyst for hydrogen evolution.