MJ may refer to:
In Norse mythology, Mjölnir (Old Norse: Mjǫllnir, IPA: [ˈmjɔlːnir]) is the hammer of Thor, a major Norse god associated with thunder.
Mjolnir (/ˈmoʊlnᵻr/ MOHL-n(ee)r) is a fictional weapon appearing in American comic books published by Marvel Comics.
Mjøndalen IF is a Norwegian sports club from Mjøndalen, Buskerud, Norway. Of the different athletic endeavours that the club supports, it may be best known in Norway for its bandy national championship teams and internationally for its association football national championship teams that have competed in UEFA championships.
Moses Perkins (born November 19, 1981) is an actor and musician turned social media marketing guru living in Los Angeles, California.
mjunction services limited is a 50:50 joint venture of two Indian steel conglomerate – the Steel Authority of India Ltd (SAIL) and Tata Steel.
MJM Music PL, is a Polish independent record label founded in 1990 in Warsaw by Polskie Radio journalist Andrzej Wojciechowski.
Mjini Magharibi Region (also known as the Zanzibar Urban West Region) is one of the thirty regions of Tanzania.
MJP Architects is an employee-owned British architectural practice established in 1972 by Sir Richard MacCormac, and based in Spitalfields, London.