The Roman Catholic Diocese of Luziânia (Latin: Dioecesis Lucianiensis) is a diocese in the ecclesiastical province of the Metropolitan of Brasília in Brazil.

Its cathedral episcopal see is Catedral Nossa Senhora da Evangelização, dedicated to Our Lady of Evangelization, located in the city of Luziânia, Goiás state.

As per 2015 it pastorally served 639,000 Catholics (78.3% of 815,600 total) on 16,424 km² in 32 parishes and 2 missions with 57 priests (30 diocesan, 27 religious), 4 deacons, 101 lay religious (62 brothers, 39 sisters) and 13 seminarians .

(all Roman rite)

This article on a Roman Catholic diocese in Brazil is a stub.