The Roman Catholic Diocese of Imperatriz () is a suffragan Latin diocese in the ecclesiastical province of the Metropolitan of São LuÃÂs do Maranhão in northeastern Brazil.
Its cathedral episcopal see is Catedral Nossa Senhora da Fátima, dedicated to Our Lady of Fatima, in the city of Imperatriz, Maranhão state.
As per 2014, it pastorally served 414,000 Catholics (79.9% of 518,000 total) on 25,958 km<sup>2</sup> in 27 parishes and 2 missions with 43 priests (29 diocesan, 14 religious), 1 deacon, 65 lay religious (19 brothers, 46 sisters) and 7 seminarians .
(all Roman rite)