The 18th Letter is the debut solo album of American emcee Rakim, released November 4, 1997, on Universal Records in the United States. The album features production by DJ Clark Kent, Pete Rock, Father Shaheed, Nick Wiz and DJ Premier. It contains lyrical themes that concern hip hop's golden age, Rakim's rapping prowess, and the state of hip hop.

William Michael Griffin Jr., better known by his stage name Rakim, is an American rapper. He is one half of golden age hip hop duo Eric B. & Rakim, with whom he released four albums: Paid in Full (1987), Follow the Leader (1988), Let the Rhythm Hit 'Em (1990), and Don't Sweat the Technique (1992). He also released three solo albums: The 18th Letter (1997), The Master (1999), and The Seventh Seal (2009).