Xenia Cage (born August 15, 1913, Alaska, USA – died September 26, 1995, New York City, New York, USA) was an American painter, sculptor, bookbinder, conservator, and musician notable for her surrealist mobiles and artistic collaborations.
From 1935 to 1945, Cage was married to the musician and composer John Cage and performed in his percussion ensemble throughout their marriage. She is believed to have been the "female performer" who smashed a lime ricky bottle into a can of broken glass at the culmination of John Cage's Construction in Metal.