Nossa Senhora do Rosário is a civil parish and most populated area in the municipality of Lagoa, on the island of São Miguel, in the Portuguese archipelago of the Azores.

Rosário was originally part of the neighboring parish of Santa Cruz, but quickly its population and socio-political importance grew, requiring an administrative solution.

From this freeway the border follows the Canada Nova do Pópulo, then Rua Padre Domingos da Silva Costa, before bisecting towards the coast through the property of Prolacto-Nestlé factory.

To the west, alongside the Via-Rapida, is the industrial zone of the city of Lagoa, to the north the main modern residential community, while to the interior are landscapes of walled agricultural lands and forest woodlots.

Rosário is an industrial center in the region, the location of several large and artisanal businesses that produce oils, animal feed, soap, services that include carpentry, metallurgy, saw mills, as well as the sale of alcohol, ceramics, paints.