Samuel J. Coomes (born April 23, 1964) is an American musician, and one half of the indie band Quasi, along with his ex-wife, drummer Janet Weiss.

Coomes was also a member of the mid-1980s underground pop band The Donner Party and replaced Brandt Peterson as the bassist for the 1990s Portland indie rock band Heatmiser, playing on their final studio album, Mic City Sons.

Coomes formed Motorgoat in Portland, Oregon, in 1990 with Janet Weiss, and they released two cassettes and one 7" single before disbanding and becoming Quasi in 1993.

He also performs on keyboards and vocals with the Oakland, California-based band Pink Mountain,[1] and formed the duo Crock with Spencer Seim (Hella, Solos, The Advantage) which released an album, Grok, in 2011.

[2] Coomes also appeared with Jandek in two NW shows along with drummer Emil Amos (Om, Grails, Holy Sons), documented on the album Portland Thursday (2009) and Seattle Friday (2011).