Nova Porteirinha is a municipality in the north of the state of Minas Gerais in Brazil.
Nova Porteirinha is part of the statistical microregion of Janaúba.
The main economic activities are cattle raising (4,700 head in 2006) and farming with a large production of bananas (1,650 ha (4,100 acres)) and modest production of tropical fruits, sugarcane, corn, and coconuts.
In 2006 there were 644 rural producers with a total area of 9,700 ha (24,000 acres).
The Gross Domestic Product was R$ 40,300,000 (2005), which was mainly generated by services.