| Contracting Party | Treaty | Signature | Instrument | In Force | Details |
|---|
| Sierra Leone | Beijing Treaty on Audiovisual Performances | June 26, 2012 | | | |
| Sierra Leone | Madrid Agreement (Marks) | | Accession: March 17, 1997 | June 17, 1997 | Details |
| Sierra Leone | Madrid Protocol | | Accession: September 28, 1999 | December 28, 1999 | |
| Sierra Leone | Paris Convention | | Accession: March 17, 1997 | June 17, 1997 | Details |
| Sierra Leone | Patent Cooperation Treaty | | Accession: March 17, 1997 | June 17, 1997 | |
| Sierra Leone | WIPO Convention | | Accession: February 18, 1986 | May 18, 1986 | |
