The cover of At Folsom Prison is a close-cropped portrait of Johnny Cash, head bowed and half his face falling into shadow. Jim Marshall made the photograph at Folsom State Prison on January 13, 1968, the day Cash recorded two performances that were edited into the live album.

Cash knew Marshall from the early 1960s and personally asked him to photograph the prison concert. Marshall's archive says he was the only official photographer there and had unrestricted access. Columbia had hired him to document the planned album, so the sleeve image came out of the same on-location access that produced his wider record of Cash arriving, rehearsing, performing and moving through the prison.

That matters to the way the cover feels. Cash is not presented as a polished studio star. He looks absorbed, tired and physically present in the room. The photograph carries the same documentary weight as the record itself: evidence of a specific day in a specific place, close enough to feel almost intrusive.