Sajid Island or Segid Island is an inhabitaed coral-derived off the south-western coast of Saudi Arabia. It is part of the Farasan Islands archipelago, located in the southern Red Sea. It is the second-largest island in the archipelago after Greater Farasan. Both islands are connected by a bridge. 24 km long and 12 km wide, the island covers an area of 156.0 km<sup>2</sup> and its shoreline is 82.7 km.
Natural features include coastal mangrove fringes dominated by Avicennia marina, and coral reefs.