Hypnos is an independent record label, located in Portland, Oregon, United States. It was started in 1996 by M. Griffin to release his own recordings, both solo and for his collaborative project Viridian Sun, and has since become an established ambient label.
The music released tends toward more minimal, dark ambient or drone styles, mostly electronic in basis, though ambient works based upon guitar, tuba, cello, and location recordings have also been released by Hypnos.
Their first release was the CD Washed in Mercury by Saul Stokes in 1997. As of 2011, more than 100 CDs have been released by Hypnos and its sub-labels.
Griffin has also started several side-labels with collaborators to focus on other genres of music. These include the Binary and Hypnos Secret Sounds sub-labels.