A sin-eater is a person who consumes a ritual meal in order to spiritually take on the sins of a deceased person.

Sin-eater may also refer to:

• Sin-Eater (character), a Marvel Comics character
• Onimar Synn, also known as Sin-Eater, a DC Comics character
• Sin Eater, a character in the film The Incredible Journey of Doctor Meg Laurel
• The Sin Eater, also known as The Order, a 2003 film
• The Sin Eaters, a 2009 audiobook
• "Sin-Eaters" (song), a 2010 song by The National
• Geist: The Sin-Eaters, a 2009 role-playing game

• The Last Sin Eater, a 1998 novel by Francine Rivers
  • The Last Sin Eater (film), a 2007 film based on the novel
• The Sin Eater's Daughter, a novel series by Melinda Salisbury