Cachaço is a settlement in the northwestern part of the island of São Nicolau, Cape Verde.

It is situated 3 km southwest of Fajã de Baixo and 5 km west of Ribeira Brava.

It lies on the national road from Tarrafal de São Nicolau to Ribeira Brava (EN1-SN01).

Cachaço lies at about 700 m elevation, at the northeastern foot of Monte Gordo, and partly within the Monte Gordo Natural Park.

Several rivers have their source near Cachaço, including the north-flowing Ribeira Grande and the east-flowing Ribeira Brava.