Iasos or Iassos ( or ), also in Latinized form Iasus, was an ancient Greek city in Caria located on the Gulf of Iasos (now called the Gulf of Güllük), opposite the modern town of Güllük, Turkey. It was originally on an island, but is now connected to the mainland. It is located in the Milas district of Muğla Province, Turkey, near the Alevi village of Kıyıkışlacık, about 31 km from the center of Milas.
Iasos (born in Greece in 1947, American resident from 1951), is a new age musician living in the San Francisco Bay Area of California. He is one of the earliest creators of the " new age" genre. His company, Inter-Dimensional Music, is based in Sausalito, California. The psychology department at Plymouth State College rated his Angelic Music album as being closest to the music heard by people who have had Near-death experiences. The Buddhist philosopher Alan Watts has said "Iasos is doing the classical music of the New Age." Guitarist Lee Underwood has said "Angelic Music...perhaps exemplif(ies) the best this genre has to offer."