The Diocese of Niassa (pt. Diocese Anglicana do Niassa) it is one of the two Anglican dioceses of Mozambique, both part of the Anglican Church of Southern Africa. This diocese is the more Northern of the two, the other is Lebombo. It is divided into six archdeaconries: Cobue, Lunho, Lichinga, Milange, Rio Chire and Lurio.
The current bishop is Mark Van Koevering, an American of Dutch descent, in office since 2003.
The diocese registered a coat of arms at the Bureau of Heraldry in 2001 : Per fess wavy Or and Azure, in chief a dug-out issuant Brunatre, seated therein a fisherman proper, vested about the loins Argent and holding pendant from a handline Sable a fish Argent, in base three barrulets wavy of the last; the shield ensigned of a mitre proper.