From the Wikipedia page 
Porto Novo is a concelho (municipality) of Cape Verde. Situated in the southern part of the island of Santo Antão, it covers 72% of the island area, and is home to 41% of its population, the municipality is the second largest and the seventh most populated in Cape Verde. Its population at the 2010 census was 17,906, some read as 18,028. Its capital is the town Porto Novo.
Its highest point, which is also the highest point of the entire island, is Topo da Coroa, elevation 1,979 metres (6,493 feet).
The municipality consists of two freguesias (civil parishes):
- Santo André
- São João Batista