Unknown Known is an album by the Joshua Abrams Quartet, led by double bassist and composer Abrams, and featuring tenor saxophonist David Boykin, vibraphonist Jason Adasiewicz, and drummer Frank Rosaly. Consisting of six original compositions by Abrams, it was recorded on December 12, 2010, at Engine Studios in Chicago, and was released on CD in 2013 by the Rogueart label.

Joshua Abrams is an American composer and multi-instrumentalist who plays the double bass and guimbri.