A free public concert in Nashville by family and friends of the singer will also honour his six-decade career, reported Huffington Post.
The 46-cent stamp will feature a 1963 image of Cash shot by Frank Bez during the photo session for the album Ring of Fire: The Best of Johnny Cash.
Cash's son, John Carter Cash, said the stamp is unusual, and therefore appropriate for his father's legacy.
"It just truly embodies my father's spirit, who he was. It's different. That's one thing: It stands out to me as being unique. It's very commanding when you see the stamp," he said.
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Jamey Johnson and The Roys also are scheduled to perform.
The stamp, like many commemorative stamps, is expected to be a big seller since people who might not normally buy stamps will pick them up as a collector's item.
A decade after his 2003 death, Cash remains a popular figure with million-dollar sales. A celebration of what would have been his 80th year started last spring and efforts to preserve his legacy continue in Nashville and his birthplace in Arkansas.