São Nicolau (Portuguese meaning Saint Nicholas) is one of the Barlavento (Windward) islands of Cape Verde. It is located between the islands of Santa Luzia and Sal. Its population is 12,769, with an area of 388 km². Its economy consists mainly of agriculture as well as fishing and tourism near its beaches. Much of the population is rural. Preguiça Airport is located to the south between Vila da Ribeira Brava and Campo.
The mountainous island is mostly agricultural but is subject to droughts. The flat areas and hills dominate most of the coastline and the central part. A peninsula covers the eastern part of the island. The highest point on the island is Monte Gordo (1,312 m). Other mountains include Monte Bissau in the central part and Pico do Alberto to the east.