Psara is a Greek island in the Aegean Sea. Together with the small island of Antipsara it forms the municipality of Psara. It is part of the Chios regional unit, which is part of the North Aegean region. The only town of the island and seat of the municipality is also called Psara.

Chios is the fifth largest Greek island, situated in the northern Aegean Sea, and the tenth largest island in the Mediterranean Sea. The island is separated from Turkey by the Chios Strait. Chios is notable for its exports of mastic gum and its nickname is "the Mastic Island". Tourist attractions include its medieval villages and the 11th-century monastery of Nea Moni, a UNESCO World Heritage Site.