The Ruvuma River forms much of the northern boundary of the province with Ruvuma Region, Tanzania, while Lake Niassa forms the western border of the province, separating it from Malawi.

Answers provided a majority of protestants (74%) in the administrative post of Cobue, bordering Lake Niassa and inhabited mostly by the Nyanja.

The majority of the Yao are nominal Muslim (a fact that can be recognized in a map's administrative posts north of the river Messalo).

Religion in Niassa Province[7] In 1998, a provincial college was built in Lichinga to train teachers.

Partially financed by the Irish Embassy in Maputo, it graduates 60 teachers per year.