Project Gutenberg is a volunteer effort to digitize and archive cultural works under U.S. copyright law.

Project Gutenberg or Gutenberg project may also refer to:

• Project Gutenberg (film), (aka Mo Seung; 無雙) a 2018 Hong Kong crime thriller film
• Project Gutenberg Australia, a Project Gutenberg sister project under Australian copyright law
• Project Gutenberg Canada, a Project Gutenberg sister project under Canadian copyright law
• Project Gutenberg Encyclopedia or Encyclopædia Britannica Eleventh Edition