Sahara is a 2005 American action-adventure film directed by Breck Eisner based on the best-selling 1992 novel of the same name by Clive Cussler. It stars Matthew McConaughey, Steve Zahn and Penélope Cruz, and follows a treasure hunter who partners with a WHO doctor to find a lost American Civil War Ironclad warship in the Sahara Desert.

The film was shot in 2003 on-location in Morocco as well as in the United Kingdom. It became notable for its many production issues, including doubling its production budget from $80 million to $160 million and a series of lawsuits. Sahara grossed $119 million worldwide at the box-office, ultimately failing to recoup all of its costs, and is often listed among the biggest box-office failures of all-time.