In the United States, the following are genenerally are in the public domain:
Questions about whether something is in the public domain? Ask a librarian!
This site is intended for informational purposes only. Library staff members cannot give legal advice. For legal advice, you should contact an intellectual property attorney.
The public domain consists of works that are ineligible for copyright protection, works with expired copyrights, or those that have been placed in the public domain by the creator. These materials are owned by no one and are considered "public property." As such, they are available for anyone to use without permission.
For more information about how to discern if something is in the public domain in the United States, see:
Remember: just because something is in the public domain doesn't mean you shouldn't cite it. Always give proper credit to your source!
Want to put your work in the public domain? Or at least give away some of your copyrights? Use a Creative Commons license.