Nansio is a small Tanzanian port town and capital of Ukerewe District in Mwanza Region.

Nansio is a port of entry for passenger and freight shipping services from the city of Mwanza.

The ward of Nansio is one of twenty-four in the district of Ukerewe.

In 2016 the Tanzania National Bureau of Statistics reported there were 8,644 people in the ward, up from 7,674 in 2012.

This Mwanza Region location article is a stub.