Sal Rei is a city located on the northwestern coast of Boa Vista, an island in eastern Cape Verde. It serves as the primary urban settlement for the island and functions as the seat of the Boa Vista Municipality.
The name Sal Rei translates to "King Salt" in Portuguese, a designation derived from the island's historical reliance on salt production as its main industry. As of 2010, the city had a recorded population of 5,778 residents.