Coso or COSO may refer to: Coso (former settlement), California Coso Junction, California Coso Range, in eastern California Coso Hot Springs, in the Coso Volcanic Field Coso Volcanic Field, in southeastern California Coso artifact, found in 1961 Coso people, Native American tribe associated with the Coso Range COSO Cash or share option, a warrant where the settlement is either cash or physical delivery of shares Committee of Sponsoring Organizations of the Treadway Commission, to combat corporate fraud